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Title: Basic physics questions
Description: This PDF contain basic and important questions for all competetive exams like teaching exam.
Description: This PDF contain basic and important questions for all competetive exams like teaching exam.
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Science
No
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Charles H
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E
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P
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Parker
Sir George Caley
J
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Lundstrom
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ES
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Sir J
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Fleming
Forces acting on bodies at
rest
The first American to orbit earth was
John H
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Question
Answer
151
Bismuth was discovered by
Valentine
152
The biggest plant seed is
Cocodemer
153
Toxicology is the study of
Poisons
154
Virology is the study of Viruses
155
Paleontology is the study of
156
Calorimeter is used to measure Quantity of heat
157
Chronometer was invented by
John Harrison
158
Stethoscope was invented by
William Stockes
159
Spinning frame was invented by
160
Al stands for
Aluminium
161
Gd stands for
Gadolinium
162
Ir stands for
Iridium
163
Bi stands for
Bismuth
164
The Chemical formula of sodium bicarbonate is NaHCO3
165
The chemical formula of common salt is
Nacl
166
The chemical formula of washing soda is
Na2CO3,IOH2O
167
The chemical formula of lime soda is
168
The chemical formula of chloroform is CHcl3
KE
Gahn
ES
S
Potash
Fossils
SU
CC
ET
T
Y
144
Sir Richard Arkwright
CaCO3
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169
The study of grasses is known as
Agrostology
170
The study of antiquities is known as
Archaeology
171
The study of the duration of life is known as
172
The study of bacteria is known as
173
Nylon was invented by Dr
...
Carothers
174
Electric razor was invented by Jacob Schick
175
The symbol of silver is Ag
176
The symbol of silicon is
Si
177
The symbol of titanium is
Ti
178
Calcium oxide is commonly known as
179
A deviation of light passing from one medium to another is known as
180
An apparatus for generation of atomic energy is called a Reactor
181
A machine used for converting mechanical energy into electrical energy is called a
Generator
182
The first Indian woman in space was
183
The revolver was invented by
184
The refrigerator was invented by
185
Which is the only common metal that is liquid at room temperature?
Y
Chronobiology
ES
S
KE
Bacteriology
SU
CC
Quick lime
Refraction
Kalpana Chawla
Samuel Colt
J
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187
Why do we see lightning much before we hear thunder? This is because light travels much faster
than sound
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99 x 108 mt / sec (2,99,000 km/sec) whereas sound travels @ 333 mt/sec
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192
Where do platypuses live?
In burrows near water
...
...
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193
How many days does the moon take to go round the earth?
27 1/3 days
...
What kind of leaves do silkworms thrive on?
Mulberry leaves
...
197
Why is it dangerous to look at die sun during an eclipse?
During solar eclipse, the
ultraviolet rays are in such high proportion in sunrays, that they can cause irrepairable damage to the eye
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The surfaces are
slippery and they have hairs, which point downwards
...
It is then
easily digested
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200
Where in India do the migratory cranes of Siberia settle down?
201
How many arms does a starfish have?
The Rann of Kutch
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SU
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202
What is a solar eclipse? The moon comes in between the sun and the earth, and thereby prevents
sunlight from reaching the earth
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205
Why does a rhinoceros spend so much time in mud?
insect bites
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207
In which country was silk first made?
ET
206
China
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In its pure form it looks like white sugar
...
It is said that too much cholesterol in the blood is responsible for the hardening of arteries
and for various other heart ailments
...
T
209
210
What is vulcanisation of rubber?
The process of hardening rubber by adding sulphur and
heating the mixture is vulcanisation
...
Raw rubber is
sticky
...
Charles Goodyear discovered
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that by combining raw rubber with sulphur and by heating it, the rubber becomes stronger and elastic and
also resistant to solvents
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When faced with danger what does a Pangolin do?
It rolls into a ball
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213
What is glass made from?
214
What is the microscopic study of plant and animal tissue called? Histology
...
Y
211
215
How does a mariner's compass help the mariner?
The needle of the compass always
points towards the magnetic north pole
...
Which is the second largest planet in our Solar System? Saturn
...
ES
S
216
218
The arms of the Octopus have sucker cups
...
219
What food does a bear love most?
To hold onto a
Honey
...
The slate became ready to reuse
...
222
How is a pearl formed within the body of an oyster?
A pearl is formed when a grain of sand
or other foreign matter gets between the hard outer shell and the inner coat called the mantle, of a
mollusc
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Many thin layers of
nacre give the pearl its lustre
...
ET
224
What is a Catamaran? A boat with twin parallel hulls
...
225
How many ears does a spider have?
None
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T
227
What is acceleration? The time rate at which the velocity of a point is changing is acceleration
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The term acceleration is used when
the speed keeps increasing
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228
How does a spider eat its food? The spider inserts his fangs into the victim's body and uses them
as straws to suck out the liquid
...
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230
Why do people living in the deserts prefer white colour for their robes? White coloured robes
do not absorb light, whereas dark-coloured clothes absorb the light and conduct heat to the body
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232
In which country was the day first divided into 12 parts? Babylon (modern Iraq)
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You must have seen
that a boatman pushes the water backwards with his oar
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This is propulsion
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In a
rocket when hot gases come out of the rear with great force as a result of combustion, a force is created in
the opposite direction
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Heat, fuel and oxygen
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236
Who invented the aeroplane heavier than an air machine that could fly? Orville and Wilbur
Wright
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They cannot curl their toes
...
239
Ancient Sumenans used to write on clay
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This would remove the moisture from the tablets and harden them
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By baking the
Indian female elephants do not have
241
Bats cannot see
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This helps the bats to move about
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It throws out its tongue, which is sticky and catches the
243
seas
...
They also provide food, oil and minerals
...
246
What is the meaning of the pecking order?
Pecking order is an example of hierarchy among
animals, particularly hens
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A hen can peck at others weaker than it, but must permit pecking by
senior members in the hierarchy
...
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KE
249
Y
248
How are volcanoes caused?
Deep under the crust of the earth is molten rock or lava, also
called magma
...
When this hot boiling mass finds an outlet in the underside of the earth's crust, it comes through the
surface as lava
...
The bulls of some species
have air sacs, which help, increase the volume of the sound
...
ES
S
252
What is peristalsis?
Peristalsis is a type of movement occurring in the hollow organs of
animals, which causes their contents to be pushed ahead
...
Its ears as well as tusks are larger than those of an Indian
elephant
...
Lister use carbolic acid to cover wounds?
256
What is the juice of the rubber plant called?
Latex
257
Why does the ostrich eat sand or gravel?
To digest its food
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To prevent infection
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Since soap is made from caustic soda and fat, manufacturing soap
became cheaper
...
ET
259
261
Why didn't the British plant rubber in England? Rubber grows only in tropical countries
...
A tiger that has preyed on man and has tasted human flesh often
continues to prey on man
...
It was invented by James Starley
...
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264
Why does not the moon have an atmosphere? Even if it had some atmosphere, its mass is so
low that gravity on the surface is not enough to retain the atmosphere
...
Y
265
wide
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Some large meteorites can crash against the surface of the earth
and cause damage
...
269
Are the soldier ants male or female?
270
What is the nest of a penguin made of? Pebbles
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271
What are the characteristics of a parasitic plant? They cannot produce their own food and obtain
food from other sources
...
Two atoms of hydrogen fuse at high temperatures to form an atom of helium
...
273
What is meant by Binary System?
We carry out everyday calculations, using the decimal
system, with the numbers 1 to 9 and zero
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An electric
current can be switched on and off using off for 0 and on for 1
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274
Which was the first spaceship launched by man?
275
What kind of nests do owls build?
laying eggs
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They use hollows in trees for
Why is polished rice less healthy than unpolished
ET
rice? The husk of food grains (rice, wheat, etc) has Vitamins, much of which are lost when the grains
are polished
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Pierre and Marie Curie
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280
What are Epiphytic plants?
Plants that grow on other plants for support
...
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What are they?
prey that are left after the food is digested
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KE
Y
282
What does a ruminant mean? Ruminant is an animal that chews its cud and has a fourchambered stomach
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Chewing and digestion are carried out at leisure
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When it is swallowed a second time it takes a different route
...
283
Who discovered the Planet Uranus?
284
Who invented Television?
285
How do dolphins communicate with each other? By producing screeching sounds
...
290
Which was the first satellite launched by India? Aryabhata, in 1975
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Valentina Tereshkova
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SU
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Rabies
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292
Who invented the Radio?
G
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293
What was the theory of the atom put forward by Rutherford?
Rutherford put forward the
theory that every atom consists of a tiny nucleus with a positive charge, surrounded by electrons
...
Of which element is diamond made of? Carbon
...
Yet it can locate its prey accurately
...
Who first propounded the theory of Evolution of Man? Charles Darwin
...
Which instrument is used for measuring humidity?
Hygrometer
...
The atmosphere on the moon is negligible
...
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300
What is the difference between Toads and Frogs?
have a smooth moist skin
...
Who first discovered that water was produced by burning hydrogen?
Henry Cavendish
...
What are the parts of a comet? Nucleus, coma and tail
...
KE
303
Why are the blades of the fan slightly curved? If you wish to carry sand or any solid substance
from one place to another, you can carry little if there are straight metal strips
...
In the case of air, which is a fluid, a slightly curved blade is enough to help circulate air in the
room
...
It corresponds to -273
...
305
Who is considered the father of plastic surgery in ancient India? Sushruta
...
SU
CC
306
What are isotopes?
Isotopes are different forms of an element with the same number of
protons, but a varying number of neutrons in the nucleus of an atom
...
Atoms have a nucleus, which consists of proton or protons and neutrons
...
Hydrogen has two naturally existing
isotopes - one with only a proton and no neutron in its nucleus and another with a neutron and a proton
...
The second one is rare and is called deuterium or heavy
hydrogen
...
Tritium has one proton and two
neutrons
...
308
Which planet has a moon named Titan? Saturn
...
Femur (in the thigh)
...
ET
307
311
What was the name of the instrument used by Jagadis Chandra Bose to measure sensitivity of
plants? Crescograph
...
Aerial roots
develop from its branches and they take root in the soil
...
It is said that the entire army of Alexander had taken
shelter under one such banyan tree
...
Yuri Gagarin
...
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tetsuccesskey
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Reinforced concrete is ordinary concrete which has steel rods
In ancient India shells of a sea-animal were used as money
...
KE
317
Y
316
What is meant by latent heat? Heat absorbed when a substance changes its state without
changes in temperature, e
...
water boils at 100°C
...
318
How does spraying kerosene on marshes reduce mosquitoes?
A film of oil is produced which
prevents the larvae of the mosquitoes from having access to the oxygen in the atmosphere
...
320
Who is considered to be the father of Geometry?
Euclid
...
322
Which was the first satellite India launched from Indian soil using an Indian launch vehicle,
SLV3? Rohini Satellite (RSI)
...
They are so small that we can see them only with a microscope
...
Bacteria cause and spread diseases, but there are many bacteria that are
helpful to man
...
324
What is the name of the instrument that records heart beat?
325
Cardiograph
...
326
Who discovered the presence of neutrons in the nucleus of elements?
Chadwick
...
328
What do deciduous trees mean? Trees that shed leaves in autumn are called deciduous trees
...
Hydroelectricity
...
Musical instruments produce sounds by vibrating strings
...
To test this take a steel tumbler
and tap on it with a metallic spoon
...
Hold the edge of the tumbler between two fingers
...
This illustrates the importance of vibration in producing sound
...
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tetsuccesskey
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Y
332
How are motion pictures made? When the eyes see an image, they hold onto it in the form of a
visual memory for a fraction of a second after it is gone
...
The usual numbers of pictures that are projected per second are 24
...
KE
334
Who was the first person to find out that microscopic organisms are responsible for milk, wine,
etc turning sour?
Louis Pasteur
...
336
Who invented the Hovercraft? Christopher Cockerell
...
339
Why does the planet Mars appear red? Due to the highly oxidised surface of the planet
...
Vitamin A
...
343
How does an Octopus camouflage itself?
background
...
By changing its colour and merging with the
344
Who first proved that lightning is an electric charge coming down to the earth?
Franklin
...
They constantly strike the molecules of the earth's upper atmosphere
...
The atmosphere absorbs most of these rays
...
After the caterpillar is completely wrapped in its cocoon, it sleeps through the winter
...
Light Amplification by Simulated Emission of
How is cement obtained?
349
Name the only mammal, other than man, that can walk upright? Gibbon
...
Goitre
...
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352
Which animal has the longest life span? Tortoise
...
KE
354
Y
353
How is the glow of a firefly caused?
When certain proteins get oxidised, in the presence of an
enzyme called luciferase, light is produced
...
Here in the presence of luciferase, light is produced
...
When they are
near the sun, they look like stars with long glowing tails
...
Some comets appear near the sun only once in millions of years
...
The head is surrounded by a coma or a fuzzy hood
...
357
Why does a metal rod feel cooler than a piece of wood? Metals are good conductors of heat
...
A piece of wood is a
bad conductor of heat and therefore it does not take away the heat from our hands
...
359
How many teeth do sheep have on their upper jaw?
None
...
Hence they are useful in dropping food or rescuing stranded people
...
361
How can lizards walk on walls? The base of their paws has cuplike structures that stick to the
walls
...
362
How does a perfume spread to the corners of any room even though there is no breeze?
Molecules of oxygen, nitrogen and other gases in the air keep on spreading all around them
...
ET
364
Chlorine is very injurious to health
...
The table salt we use is sodium chloride
...
Sodium and Chlorine combine to form table
salt, which is healthy (in small amounts)
...
The properties of hydrogen as well as oxygen are not found in water
...
T
365
366
What is the difference between a tortoise and a turtle? Tortoise is the name applied to the
terrestrial species and turtle is the name applied to the aquatic species
...
...
tetsuccesskey
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For example, iodine sublimates from its
solid state to vapour
...
370
Sawdust is a bad conductor of heat and slows
KE
369
Why do people cover ice slabs with sawdust?
down the melting of ice
...
ES
S
371
Why is food preserved in a refrigerator? Most bacteria are destroyed as the temperature of the
surroundings rises
...
Similarly low
temperatures prevent bacteria from multiplying
...
372
Why do we feel sleepy after a heavy meal?
The blood circulation to the digestive tract
increases
...
This makes us sleepy
...
SU
CC
373
Kidneys
...
They are named Aurora Borealis (northern lights) or Aurora Australis (southern lights)
depending on their position
...
The
aurora consists of rapidly shifting patches and dancing columns of light of various hues
...
377
What is the composition of perspiration?
378
Which gland in the human body produces insulin?
Pancreas
...
Mostly water with a little salt
...
It was discovered by Jonas
Edward Salk in 1952
...
The vaccine was tested first on
monkeys and eventually on children, including Dr
...
T
381
What are Pachyderms? Animals with thick skin like elephants and rhinoceros
...
On exposure to sunlight, man's skin undergoes gradual tanning to protect the skin from
injurious solar rays
...
...
tetsuccesskey
...
384
Which is the second most common element on the
385
Which planet is known as the red planet?
Y
earth's surface? Silicon
...
KE
386
What does a lizard do when its life is in danger? The lizard discards its tail to divert the attention
of its enemy
...
When they rest on a food plate, these may be transferred to the object they rest on
...
389
What is the main food of a Koala bear? Eucalyptus leaves
...
But
the hair is lodged in a follicle located a little below the scalp, which is very much alive
...
The living hair pushes up the dead tissue
...
Pull out a hair and you will feel pain and understand the truth of this statement
...
What is the common food of the Blue Whale?
A shrimp like creature called krill
...
It is also called Alpha Orionis, It takes about 300 years for the light from Betelgeuse
to reach the earth
...
395
What do a koala bear, opossum, wombat and bandicoot have in common?
Marsupials, i
...
they carry their young ones in pouches
...
Anton Van Leeuwenhoek
...
ET
396
T
398
Why do water pipes burst in hill stations?
There is an unusual expansion of water, when its
temperature goes below 4° C
...
Unable to bear the pressure, the pipe bursts
...
Michael Faraday
...
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402
Who first put forward the Atomic Theory that all matter is made of atoms, held together by some
force of attraction?
John Dalton
...
During summer and autumn, the ring that grows
is darker
...
After
counting the rings, we can assess the age of the tree
...
The rotation results in night and day
...
This tilt causes changes in the earth's position, which results in the
seasons
...
ES
S
Vitamin D
...
If they did not gnaw at things their teeth would keep on growing
...
SU
CC
To smell the surroundings
...
Galileo Galilei
...
413
How is petroleum formed?
Remains of plants and tiny animals that lived millions of years
ago remain buried and turn into petroleum
...
When we ride along highways particularly in arid regions, we see a reflection ahead, which looks
like water
...
Light rays from the
sky are reflected toward one's line of vision - what one sees is a reflection of the sky and not water
...
As
a result of the chemical reaction, starch is produced
...
Which is the juice secreted in die liver which helps digestion?
Bile
...
It must be noted that sound is caused as a result of vibrations in air columns or
strings or objects
...
418
Which is the longest poisonous snake in die world?
King Cobra
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419
What is the tendency of plants to grow towards sunlight called? Phototropism
...
This becomes possible because they keep casting off old skin and develop new
skin, when the old one is shed
...
423
How do we get heat and light from the sun?
424
How do insects breathe?
KE
421
Why does it take longer to cook food at high altitudes? The atmospheric pressure at high
altitudes is much lower than at sea level
...
It bounces off ultraviolet
Through radiation
...
ES
S
425
Why doesn't ice sink in water? Ice is lighter than water
...
426
Apart from earth on which other planet in the solar system does life exist?
As we know it
...
428
SU
CC
427
What is meant by the Water Table?
Water filters down the surface of the ground and is
absorbed and stored by soil and rocks in a zone of saturation
...
During drought, the Water Table too goes down
...
429
Why do we feel hungrier in winter?
In winter we need energy to maintain the body
temperature in addition to sustaining normal activities of the body
...
430
Can you give ah example of reflex action?
blow on the tendon just below the knee
...
It is the involuntary kick caused by a
ET
431
What is an electrocardiograph? The electrocardiograph is an electrical instrument, which records
the activity of the heart muscle
...
The
electrocardiograph records changes that occur in a regular order, during a complete heartbeat
...
T
433
Man, dogs, cats, horses have lungs through which they breathe
...
They use their moist
skin to exchange carbon dioxide for oxygen
...
Even frogs in the tadpole
stage use their skin for respiring
...
434
What are the uses of snake venom?
nervous system
...
...
tetsuccesskey
...
437
Who invented the miner's safety camp? Sir Humphry Davy
...
of South America
...
KE
439
Y
435
440
What is Telepathy?
Telepathy is direct communication of thought from one person to
another, without using any physical channels of communication
...
ES
S
441
What is ultrasound?
Human beings cannot hear sound waves which have frequencies above
20,000 vibrations per second
...
442
Who was the scientist who initiated the Atomic Energy Programme of India?
443
Who invented the rigid airship? Ferdinand Von Zeppelin
...
449
Homi Bhabha
...
SU
CC
Blaise Pascal
...
Rudolf Diesel
...
ET
450
What causes rusting? How can it be prevented? Metals like iron are often exposed to moisture
...
Oil is often used to slow down rusting
...
451
What is Googol?
Googol is the number one followed by a hundred zeros
...
It is commonly
believed that bulls react violently when they see a red rag
...
They react to
the teasing movement of the rag
...
Polypnenols in the
454
Why does the liquid in the egg become solid when heated or boiled?
coagulation of the yolk
...
...
tetsuccesskey
...
Roots that grow down from the branch of a tree
...
Chlorophyll
...
The theory of gravitation developed by Isaac Newton helped Halley to discover that the
bright comet that appeared in 1682 had an orbit that brought it back to the inner solar system at regular
intervals
...
ES
S
460
What is plastic surgery?
Plastic surgery is surgery performed on someone's face or body
to remove a deformity or to make it more attractive
...
Even a coin can cover the moon, if held close to the eye
...
The principle is most frequently applied to the behaviour of objects in water, and helps to
explain floating and sinking and why objects seem lighter in water
...
464
What are corals?
in a colony
...
ET
466
Why does water in an earthen pot become very cool in summer? Earthem pots have tiny holes
from which water seaps out to the surface
...
467
Why do dogs pant?
To keep themselves cool
...
This directly results in cooling
...
T
468
Which important mineral is to be found in spinach?
Iron
...
470
Who first isolated Sodium?
Sir Humphry Davy
...
...
tetsuccesskey
...
It is usually directed by sound waves, light waves or radio waves
...
Birds discard old
feathers for new ones
...
Snakes keep on growing, unlike human beings
whose growth stops after attaining adulthood
...
Lobsters,
crabs, etc have a hard covering outside the body to support
...
Frequently during such periods, the animal hides, since it has no protection then
...
Dermis and Epidermis
...
Joseph Lister
...
Lactobacillus
...
DPT is a combined vaccine
for diphtheria, whooping cough and tetanus
...
481
Why is the rainbow seen only during and after the rain? This is so because the rain drops serve
like prisms and diffract the white light of the sun into violet, indigo, blue, green, yellow, orange and red
colours
...
Radio telescopes are telescopes that can study
long waves, which are not visible
...
To be effective, radio telescope needs to be much larger than ordinary optical telescope,
483
What is smog? Smog is a mixture of solid and liquid fog and smoke particles
...
The word smog is derived from smoke + fog
...
T
485
What is the name of the radiation that comes from
outer space?
486
Cosmic Rays
...
C
...
B)
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487
What are Sunspots?
Areas where the sun's surface is slightly cooler than normal - about 4000
degree C instead of 6000 degrees C
...
489
Name the galaxy that is nearest to our galaxy
...
490
Who invented the Barometer?
491
Tn the human body what is the end product of protein
Amino acids
...
Because the gum could rub oui pencil marks
...
Y
488
493
What are salivary glands?
Salivary glands are located in the mouth
...
Salivary glands secrete an enzyme called ptyalin, which helps in the digestion of starches
...
If you see many players chewing gum, it is because when a person is tense,
the stomach produces more acids
...
SU
CC
494
Why do crocodiles shed tears? They secrete the excess salt in die body through this action
...
495
What is Bronze?
An alloy of copper and tin
...
498
Which element is important for the health of bones?
499
Which Vitamin helps in preventing rickets?
Terrible lizard
...
Vitamin D
...
What is the study of weather and climate called?
Meteorology
...
503
What are the four stages in the development of a butterfly?
T
501
a) Egg
b) Larva
c) Pupa
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d) Butterfly
504
Who invented the Radio?
G
...
Y
505
What is meant by Hibernation? Many animals sleep or go into a trance-like state during the long,
winter months
...
Polar bears go into hibernation in winter
...
507
Which present day animals are said to be direct descendants of dinosaurs?
and Crocodile
...
509
What is the study of birds called?
Ornithology
...
511
From which ore is Aluminium made?
Samuel
Bauxite
...
513
Who discovered the planet Uranus?
William Herschel
...
Which other parts of the human body do the same?
Lungs, skin and rectum
...
Only a spherical shape can withstand maximum pressure
...
ET
516
Who discovered the circulation of blood in the human body?
William Harvey, in 1628
...
It took many years for the
opposition to die down
...
The force of the string pulling the ball toward the centre is the centripetal force
...
This outward force is the centrifugal force
...
5 litres
...
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520
Which is the most destructive insect in the world?
521
Who invented the sewing machine?
522
What are the substances that can cause cancer called?
Desert Locust
...
Y
Carcinogens
...
It occurs in plants
...
What is a Supernova?
528
How many chromosomes does a man have in his body cell?
Samuel Morse
...
ES
S
A star, which suddenly burns up a lot of its matter and gives a brilliant
46
...
Selenium is used in making diese cells because its electrical conductivity increases when
light strikes it and because it can convert light into electricity
...
531
Who was the first man to study sunspots?
A German by name Hienrich Schwabe
...
533
Which planet rotates the most slowly on its axis?
Venus has thick
Venus
ET
534
How does a microwave oven work?
Water molecules vibrate and rub against each other,
producing heat because heat is produced by diese molecules an external source of heat is not required for
cooking in a microwave
...
T
536
Why does the running sound of a train change when it passes over a bridge?
Sound travels in
the form of waves
...
The sound waves are of different kinds, when a train moves on solid ground, and when it moves
on a bridge, whether made of steel or plain concrete
...
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538
What is meant by Radio carbon dating? Scientists describe the radioactivity of an element in
terms of half-life - the time the element takes to lose half of its radioactivity through decay
...
Y
539
What is the meaning of geothermal energy?
The heat produced witiiin the crust and upper
mantle of the earth, primarily by decay of radioactive elements
...
The reaction in which
heat is produced because of the fusion of two nuclei is called nuclear fission
...
In the atomic bomb dropped on Hiroshima and Nagasaki, it was a
fusion bomb
...
542
What is genetics?
Genetics is the study of all those qualities of organisms that are governed
by certain biologically active elements derived from the parents
...
544
Who is considered to be the father of modern astronomy?
545
From which material is aluminum made?
Copernicus
...
546
What are asteroids?
Asteroid means "like star"
...
Some may be only a kilometre or two in diameter
...
547
What is meant by convection of heat? A process in which heat is transferred by movement of
heated fluid such as air and water is called convection
...
549
Who was the first man to point out that things get spoiled because of germs?
Loius Pasteur
...
In combination with the water in the eye, they produce irritation
...
Apart from saliva amylases are found in pancreatic juices and intestinal juices too
...
This is called the ignition point
...
It weighs upto 200 kg
...
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555
Who propounded the theory of relativity?
Albert Einstein
...
558
In which part of their body do spiders spin the thread?
KE
Y
557
What is concrete? How is it made?
Concrete is a rock like substance made from cement,
natural sand, stone and water
...
When the material is still in a "plastic state" it can be very easily formed into
various shapes
...
Abdomen
...
Grapes are fermented to produce wine
...
560
In which part of the plant are ovules contained? Pistil
...
2 to 3 weeks
...
564
Which are the main gases in the atmosphere of the earth?
565
Who invented the stethoscope? Laennec
...
567
What is an ammeter used for?
Nitrogen and oxygen
...
ET
568
How do bats communicate with each other?
Bats produce screeching sounds
...
This helps the bats
in navigation
...
569
What are the three main constituents of a galvanic cell? a
...
A Cathode
c
...
T
570
Who invented the telephone? Alexander Graham Bell
...
571
What is the fluid part of the blood called?
Plasma
...
572
What is malaria?
Malaria is an acute disease caused by an animal parasite called
plasmodium
...
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Romans were familiar with this disease
...
575
What does the acronym RADAR mean? Radio Detection and Ranging
...
KE
576
What is meant by Diabetes?
Diabetes is caused because of inadequate secretion of insulin by
the pancreas or the inability of the body to utilise the insulin produced
...
Two atoms of hydrogen fuse to produce an atom of helium
...
Protozoa means the first animal
...
They are made of a single cell
...
Pigments consist of larger particles that form a film on the
surface
...
581
Why do flocks of swans fly in a V-formation?
resistance from the air to their flying
...
583
What is meant by the term habitat?
Habitat is the place where a certain animal or plant
would live and grow naturally
...
584
How can astronauts walk in space without any support to walk on?
any gravity far away from the earth
...
Who is usually considered to be the discoverer of oxygen?
ET
585
586
What is a Tapir? Where is it found?
Malaysia and Central and South America
...
A Tapir is an animal that looks like a pig
...
588
What is forging?
To force more
The shaping of metals by hammering them is called forging
...
Chandrasekhar was best known for his theoretical prediction, made at the age of
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20, that large stars would collapse at the end of their lives into some unknown state even more dense than
that of a white dwarf
...
s
591
Who was the first man to make a phonograph (gramophone)?
Thomas Alva Edison
...
Normal properties of space in its vicinity are altered drastically
...
He observed that the rubber had become stronger and
elastic
...
ES
S
594
How did Roentgen discover X-rays?
While experimenting with a glass tube from which the
air had been pumped, Roentgen happened to pass an electric current through the tube
...
Suddenly he noticed that the screen was glowing with a
greenish blue light
...
He named these rays X-rays
...
These can be
seen under a microscope
...
These chromosomes and genes
decide heredity
...
120 days
...
599
What are the properties of aluminium, which make it very useful, particularly in the aerospace
industry?
Aluminium is very light and yet very strong
...
Aluminium's
excellent electrical conductivity makes it very useful in making high voltage electrical conductors
...
ET
600
601
Name the first aircraft to hard land on the moon
...
It was launched on September 12, 1959
by the USSR
...
T
603
What is cerebrum?
The cerebrum is the main part of the brain and controls the ability to
think
...
604
What are citrus fruits? Citrus fruits are those, which contain citric acid in sizeable amounts
...
Lemons, oranges and limes all contain citric acid
...
...
tetsuccesskey
...
Y
606
What is carbolic acid? The scientific name for carbolic acid is Phenol
...
It is used in the preparation of some plastics
...
What is meant by a Marsupial? Animals carrying their young ones in a pouch
...
610
sun
...
ES
S
611
Why does a fire look yellowish, at times?
When the combustion (burning) is not complete
the colour of fire becomes yellowish
...
612
Which material is used to make cellophane?
walls of plant cells
...
Cellulose, the chemical substance that lines the
SU
CC
613
What is a cataract?
Cataract is a disease affecting the lens of the eye
...
Cataract is a condition in which the lens loses its
transparency and tends to become opaque
...
The amount of matter that a body contains is mass whereas the weight of an object will be a little
less near the equator (where it is further away from the centre of the earth) and a little more at the poles
...
615
What is meant by a catalyst?
A catalyst is a substance, which alters the rate of speed of a
chemical reaction, without itself being permanently changed
...
However, at times, catalysts are used to slow down a reaction
...
618
When was the metric system introduced?
During the French revolution, France introduced
the metric system
...
T
619
Where would you find a dodo? Nowhere
...
Now it is
extinct
...
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621
Of all the bones in the skull and the face, which is the only movable bone in human beings?
The lower jaw
...
The sun is one of the stars in the Milky Way
...
624
What is the difference between Direct Current and Alternating Current? The current flowing in a
circuit is described as direct current if it flows continuously in a single direction, and as alternating
current if it flows alternately in each direction
...
626
How does a thermos flask retain die heat of its contents? It has a tightly fitting cap of cork or such
material, which is a poor conductor of heat
...
Glass too is a poor
conductor
...
If the surfaces are made highly reflective, even radiation can be reduced
...
628
How are mosquito fish helpful to man? They eat mosquitoes
...
The oath reads, in part, "I swear so far as power and
discernment shall be mine, I'll carry out regimen for the benefit of the sick and will keep them from harm
and wrong
...
Into whatsoever house I shall enter I'll go
for the benefit of their sick" There is also a clause that secrecy will be maintained about the ailment of the
patients
...
diameter of its eye is about 30 cm
...
The Atlantic Giant Squid
...
633
What is an Ibex? Where are they found?
The Ibex is a mountain goat
...
It is now under Government protection
...
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634
What is inertia?
Inertia is the property of matter, which keeps a body at rest unless a force
is exerted on it
...
Y
635
Who discovered the laws of planetary motion? Johannes Kepler - Sir Isaac Newton later used
these laws as the basis of his law of Universal Gravitation
...
What is an antidote?
Robert Koch, a famous German
A remedy for poisoning is called antidote
...
ES
S
638
KE
636
What is hybridisation? Hybridisation is the mating or crossing of two parents of different
species or varieties
...
In the case of flowers, hybridisation is
done by taking pollen from one plant and dusting it on the pistils of another plant
...
Then the seeds are planted and a hybrid is formed
...
Deserts are
not always hot, dry or sandy
...
Water is frozen here and does
not support life
...
641
Why is the Egyptian plover bird popularly called the "crocodile bird"? The Egyptian plover
bird has been nicknamed the crocodile bird following an account by Herodotus that he saw these birds
enter the open jaws of crocodiles and pick pieces of food from their gums
...
643
Which was the first living being to enter space? A dog named Laika
...
But even for giving the distance between the sun and the earth, we have to write 93,000,000 million miles
or 150,000,000 kilometres
...
Hence measuring in units based on the speed of light has been adopted
...
In kilometres one light year is approximately 924 x 1013 or
9,240,000,000,000,000 kilometres
...
6 light years away
...
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646
Name the animal that can lift 50 times its weight
...
647
Which fish carries its eggs in its mouth? Catfish or Cichlid fish
...
650
KE
649
Where in the world are wooly Mammoths found?
They are extinct and are not found
anywhere
...
In which organ of the human body are the lymphocyte cells (blood cells) manufactured? Spleen
ES
S
651
What are the constituents of stainless steel?
Stainless steel is an alloy of iron, nickel and
chromium
...
SU
CC
652
What is meant by the term Water cycle? Water Cycle is the story of a raindrop, which passes
through other phases to become a raindrop again
...
This water vapour is warm and is pushed up by cold air
...
They are called winds
...
On the surface of the earth the
raindrops may join other raindrops and if the earth cannot absorb this water quickly, they form streams
and rivers
...
653
What is Plaster of Paris?
When gypsum is heated to 120° C it loses water and becomes a
white powder
...
When water is added to the powder, it hardens
...
654
Who discovered Plutonium?
655
Who was the person to first identify the proton? Ernest Rutherford
...
Glenn Seaborg
...
The fat globules present in the milk get separated and float on the top as cream
...
But when it tries to escape, it gets trapped by the thick layer of cream on the top
...
T
658
What is the difference between a porpoise and a dolphin?
Porpoises are smaller than
dolphins and they do not have beak like snouts of dolphins
...
659
Where is the pituitary gland situated in the body?
In the brain on its underside
...
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661
What is the difference between a planetarium and a telescope? Through a telescope we can see
a real but small part of the sky
...
Y
662
What is meant by the term 'Orbit'?
Orbit is the path of any body revolving around another
body
...
Where do frogs lay their eggs? All frogs go back to water to lay their eggs
...
Who was Pythagoras? He was a Greek Philosopher and mathematician who lived around 520
KE
663
Who propounded the theory that the sun and not the earth is the centre of the Solar System?
Nicolus Copernicus (Bhaskaracharya of lllh Century A
...
D
seem to be aware of this)
...
667
What is an anableps? Any of the three species of Fish, commonly referred to as four eyed fish
...
SU
CC
668
Why is it dangerous to walk on quicksand?
Quicksand is a bed of very fine, powdery wet
sand
...
Once a foot is placed on quicksand, it is not easy to pull it away
...
Struggling to take out the foot may sink the foot further down
...
If a man remains calm and does not move his foot, he may stop sinking
...
It is a chemical used to kill germs on the skin or in the wounds
...
The earth and
the other planets are satellites of the sun
...
ET
671
What is Greenwich Meridian Time?
Greenwich Meridian is an imaginary north-south line on
the earth's surface drawn through Greenwich near London and both geographical North Pole and South
Pole
...
672
Who for the first time in recorded history used a prism to split white light into many colours?
Sir Isaac Newton
...
When an electric circuit carries more electric current than it is supposed to carry, the fuse
melts and prevents fires
...
The temperature at which a liquid changes to the
675
Who made the first printing press with moveable types? Johannes Gutenberg of Germany in the
middle of the | 15* century
...
...
tetsuccesskey
...
Whenever the
circuit was complete a click sound would be heard
...
Which is the largest flesh-eating animal?
Kodiak bear
...
It changes into an adult animal that usually looks different
...
Tadpoles, which grow into frogs, caterpillars, which grow into butterflies, and grubs,
which grow to become beetles, are all examples of larva
...
The solid
layer of the earth consists of about a dozen semirigid plates
...
The increase is
imperceptible
...
This helps the crocodiles to improve
their oral hygiene
...
681
From where does the moon get its light during the night?
Earth
SU
CC
682
How many parts was a day divided into, in ancient India?
Eight parts, called prahars
...
683
What was special about the telescope invented by Newton?
The telescope devised by
Galileo was a refracting telescope
...
Another lens is used to magnify it
...
The images
produced by these telescopes are inverted
...
ET
684
How are we protected from the ultraviolet rays of the sun?
Ultraviolet rays come from the
sun
...
But this does not happen, because a layer of ozone (20 to 50 km) above the
earth's atmosphere absorbs the ultraviolet rays of the sun
...
688
Converting raw animal skin into leather
...
Bees communicate the source of nectar to others by the pattern
Who invented the Thermos Flask?
James Dewar
...
"
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"Mary had a
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690
Which is the hardest substance in the human body?
691
What is a bone made up of?
is gelatin
...
Two-thirds of the bone is calcium phosphate
...
M
...
696
Who produced the first synthetic dye?
William Perkin
...
They are coils of
soft, tiny tubes
...
Sweat glands carry moisture and waste
material to the surface of the skin
...
They don't have knees on their hind legs
...
ES
S
Graphite, whose main constituent is carbon
SU
CC
698
What is parachute? How does it work? Parachute is nothing but a big umbrella made of a
special fabric
...
If the force of the gravity is
greater than the buoyancy, the parachute moves down, but very slowly
...
699
What is inoculation?
ntroduction of germs into a body to precipitate a mild form of a disease
...
700
What is meant by Acrophobia? Fear of heights
...
Fog differs from
clouds in that fog is close to the earth and clouds are in the sky
...
Thus if an object weighing
one pound were lifted through a distance of a foot, one footpound of work would be done
...
Four
...
Every human cell contains 23 pairs of
chromosomes, which are made up of many paired particles or units called genes
...
...
tetsuccesskey
...
They are produced from the breakdown of plants and other living beings, either by bacteria or by heat and
pressure under the surface of the earth
...
Y
708
What is the human body made up of, according to Hippocrates? Blood, phlegm, yellow bile and
black bile
...
The plant stems
grow under the ground and are called tubers
...
Spanish
explorers brought the potato to Europe
...
These different periods of time make up the glacial ages
...
712
What is the common unit of measurement of electric power?
ES
S
711
Kilowatt Hour
...
What is this tiredness due to? Lactic
Acid is formed when the glycogen or sugar in the muscles is used
...
SU
CC
714
How are gills important to fish? They are used for breathing air by most Fishes and certain other
lungless animals
...
They slowly breakdown to form stable elements
...
They
grow on rocks and along beaches
...
717
Whose notebooks were Filled with ideas and sketches of inventions, including designs for an
airplane?
Leonardo da Vinci
...
What is a larynx?
ET
719
The larynx is the voice box, located in the throat
...
Robert Mulchings and Goddard
T
721
What is Brownian movement? That small particles of matter (molecules) are in constant motion
was observed by Robert Brown through his microscope, by putting very fine powder in water
...
722
What is camouflage in nature? In nature many animals resort to a number of ways to protect
themselves from enemies or predators
...
The Polar Bear, having a white colour
is an example of camouflage
...
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723
What is the chief source of uranium and radium?
The mineral, Pitchblende
...
In a basic jet engine air is compressed and forced into a chamber, where fuel is added
...
The hot gases that are produced escape from the base of the engine
...
The white fumes that you see are the hot gases as they escape out
...
KE
725
Why do some people have fat legs?
The cause of filaria (elephant leg) are worms called
Wuchereia bancrofti the female worm gives birth to young worms and not eggs
...
The immediate cause of filarial is a mosquito called culex
...
It is believed that a cold climate with a low level of
humidity is good for health
...
727
What is meant by Quarantine? Quarantine is the isolation of persons, animals or plants, which
have been exposed to communicable diseases
...
SU
CC
729
What are pseudopodia? Pseudopodia are temporary extension of the body of a one-celled animal
such as amoeba
...
731
How many pairs of legs do crabs have? Five pairs
...
733
How do planaria (flatworm) reproduce? Planaria (plural of planarium) constrict and fragment just
behind the pharynx
...
ET
734
What is a fungus?
A fungus is a plant without chlorophyll or true leaves, stem and root
...
Fungi (plural of fungus) are found almost everywhere
...
T
735
What is resonance?
When an object is set into vibration with a certain pitch (frequency) any
other object nearby that can vibrate at the same pitch, will start vibrating
...
736
Where are the vocal cords located in man?
The vocal chords are located in the larynx
...
737
What are alveoli?
The tiny air sacs in the lungs are called alveoli
...
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738
What is meant by embalming a body?
from decay, it is called embalming
...
These grow over a period
into the form of an adult animal
...
741
What do elements consist of?
neutrons, which have no charge
...
Positively charged protons, negatively charged electrons and
743
ES
S
742
What is electrolysis? Electrolysis is the decomposition of a substance using electricity
...
Who propounded the theory of relativity?
Albert Einstein
744
What is ecology?
Ecology is the study of plants and animals in relationship to their
environment
...
SU
CC
745
Why is an earthworm also called 'a Fanners best friend'? The earthworm is called the farmer's
friend because it helps him to keep the soil rich and loose so that plants can grow
...
This is enriched material
...
Whole frozen mammoths have been found below the ice in Siberia
...
748
How many satellites does Mars have?
749
What is medulla oblongata?
Two
...
ET
750
How many pairs of nerves are there in man that are connected to the brain?
They are called the cranial nerves
...
751
Why do earth and other planets revolve around the sun? Sun's gravitational force keeps the
planets in a fixed orbit
...
Which planet in the solar system moves faster around the sun than any other planet?
Mercury
...
...
tetsuccesskey
...
KE
755
Y
reproduce
...
If you moisten a piece of stale bread and keep it in the open,
there will be a greenish growth on it a little later
...
It produces penicillin
...
Most bacteria
double every half an hour
...
An antibiotic does not permit the multiplication of bacteria
...
756
Who founded the school of mathematics at Alexandria in Egypt?
mathematician Euclid around 300 B
...
The Greek
What are the remains of animals or plants, preserved deep under the earth or in rocks, etc called?
Fossils
...
The cricket
...
761
What is the study of water with reference to its occurrence in nature known as?
SU
CC
760
Hydrology
...
Quite a few varieties of bacteria double every half an hour
...
Temperatures of more than 40 degrees Celsius
are not conducive to the growth of bacteria
...
Thus, if you gargle with warm salt water, it will prevent the proliferation of
bacteria
...
Strike a stainless steel glass with a spoon
...
Stop the vibration of the steel glass with your fingers
...
When water is
being filled in a vessel, sound is produced because of the movement of the column of air
...
Hence the sound changes
...
Michael Faraday
...
767
What is magma made of?
Molten rocks
...
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769
From the bark of which tree is quinine extracted?
770
Where do frogs usually live in the hot season?
771
Who discovered Calcium?
772
Cinchona
...
Y
Sir Humphry Davy
...
773
What is matter made of?
Matter is made of electrically charged protons, found in the
nucleus and electrons travelling about the nucleus
...
774
Who first introduced vaccination in medical practice?
The Gila Monster and the Beaded
ES
S
775
Name the only two poisonous lizards in the world
Lizard
...
776
What is the scientific study of the earth's crust known as?
777
Name the mammals that lay eggs
...
Platypus and Echidna
...
779
What does U
...
O stand for?
Unidentified Flying Object
...
Acupressure
...
783
What is the thin flap of cartilage attached to the base of the tongue of terrestrial vertebrates
called? Epiglottis
...
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Title: Basic physics questions
Description: This PDF contain basic and important questions for all competetive exams like teaching exam.
Description: This PDF contain basic and important questions for all competetive exams like teaching exam.