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Science (086)
Class X
Sample Question Paper 2022-23
Max
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This question paper consists of 39 questions in 5 sections
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All questions are compulsory
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A student is
expected to attempt only one of these questions
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Section A consists of 20 objective type questions carrying 1 mark each
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Section B consists of 6 Very Short questions carrying 02 marks each
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v
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Answers to these
questions should in the range of 50 to 80 words
vi
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Answer to these
questions should be in the range of 80 to 120 words
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Section E consists of 3 source-based/case-based units of assessment of 04 marks each with sub-parts
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No
1

Questions
The change in colour of the moist litmus paper in the given set up is due to

Marks
1

i
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presence of base
iii
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presence of Litmus which acts as an indicator
(a) i and ii
(b) Only ii
(c) Only iii
(d) Only iv
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(b) Colourless gas which turns lime water milky is evolved
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(d) Reddish brown gas with a smell of burning Sulphur has evolved
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(b) turns colourless and a grey substance is deposited on the copper coin
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(d) remains green with no change in the copper coin
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Which of the following is the correct conclusion?
(a) pH of acetic acid is more than that of hydrochloric acid
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(c) Acetic acid dissociates completely in aqueous solution
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Choose the correct option

1

(a)
(b)
(c)
(d)
8

In the given transverse section of the leaf identify the layer of cells where maximum
photosynthesis occurs
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Name the chemical indicated as ‘X’ that
can absorb the gas which is evolved as a byproduct of respiration
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Which of the following depicts tropic movements
appropriately?

1

1

(a)
(b)
(c)
(d)
12

The diagram shown below depicts pollination
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(a)
(b)
(c)
(d)
13

1

A, B and C
B and D
B, C and D
A and C

A complete circuit is left on for several minutes, causing the connecting copper wire to
become hot
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remains the same
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increases for some time and then decreases
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1

The current in the wire can be reversed
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In how many of the four directions shown can the force act on the wire?
(a) 1
(b) 2
(c) 3
(d) 4
1

15

Plastic insulation surrounds a wire having diameter d and length l as shown above
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(b) straight lines parallel to the wire
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(d) concentric circles centred around the wire
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no 17 to 20 are Assertion - Reasoning based questions
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Answer these questions selecting the
appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true and R is not the correct explanation of A
(c) A is true but R is false
(d) A is False but R is true
16

17
18

Assertion: Silver bromide decomposition is used in black and white photography
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Assertion: Height in pea plants is controlled by efficiency of enzymes and is thus
genetically controlled
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19
20

Assertion: Amphibians can tolerate mixing of oxygenated and deoxygenated blood
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Reason : One end of current carrying straight solenoid behaves as a North pole and
the other end as a South pole, just like a bar magnet
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no
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21

A clear solution of slaked lime is made by dissolving Ca(OH)2in an excess of water
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The solution slowly goes milky as a faint white
precipitate forms
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OR
Keerti added dilute Hydrochloric acid to four metals and recorded her observations
as shown in the table given below:
Metal

Gas Evolved

Copper

Yes

Iron

Yes

Magnesium

No

Zinc

Yes

2

Select the correct observation(s) and give chemical equation(s) of the reaction
involved
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23

Patients whose gallbladder are removed are recommended to eat less oily food
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What are the two parameters that decide the amount of water that is reabsorbed in
the kidney?

2

2

2

2

25

State the phenomena observed in the above diagram
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26

A lot of waste is generated in neighborhood
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What impact will it have on the environment or human health?

2

SECTION - C
Q
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27 to 33 are short answer questions
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Give one example for
each type in the form of a balanced chemical equation
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(b) Name the process that occurs
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29

The leaves of a plant were covered with aluminium foil, how would it affect the
physiology of the plant?
OR
How is lymph an important fluid involved in transportation? If lymphatic vessels
get blocked, how would it affect the human body? Elaborate
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(a) Specify the range of distance where the object can be placed in front of the
mirror
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(b) Draw a ray diagram to show image formation in this case
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31

(a) A lens of focal length 5 cm is being used by Debashree in the laboratory as a
magnifying glass
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(i) What is the magnification obtained by using the glass?
(ii) She keeps a book at a distance 10 cm from her eyes and tries to read
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What is the reason for this?

3

3

3

(b) Ravi kept a book at a distance of 10 cm from the eyes of his friend Hari
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Give reasons for this?
32

A student fixes a white sheet of paper on a drawing board
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Then
he taps gently and observes that iron filings arrange themselves in a certain pattern
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OR
A compass needle is placed near a current carrying wire
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(b) The compass needle is displaced away from the wire
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no
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34

Shristi heated Ethanol with a compound A in presence of a few drops of
concentrated sulphuric acid and observed a sweet smelling compound B is formed
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5

(a) Identify A and C
(b) Give one use each of compounds A and B
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OR
(a) What is the role of concentrated Sulphuric acid when it is heated with
Ethanol at 443 K
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(b) Reshu by mistake forgot to label the two test tubes containing Ethanol and
Ethanoic acid
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Elucidate
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The house shown
in the above diagram has 5 usable spaces where electrical connections are made
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(a) What is the mode of connection to all the spaces in the house from the
mains?
(b) The spaces 5 and 4 have the same resistance and spaces 3 and 2 have
respective resistances of 20Ω and 30Ω
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What is the net resistance for space 5
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no
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Internal choice is
provided in one of these sub-parts
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They measured the mass of each object before
placing it partially immersed in 10 ml of water
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The table shows their results
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0

3
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0

6
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They also observed that zinc
initially acts as a physical barrier, but an extra advantage of using zinc is that
it continues to prevent rusting even if the layer of zinc is damaged
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OR
(b) In which of the following applications of Iron, rusting will occur most?
Support your answer with valid reason
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Pooja’s
husband Ravi has black eyes while his mother has green eyes and father has black
eyes
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(b) What is the possible genetic makeup of Pooja’s brother’s eye colour?
(c) What is the probability that the offspring of Pooja and Ravi will have green
eyes? Also, show the inheritance of eye colour in the offspring with the
help of a suitable cross
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With help of cross
show how this is possible
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Slides are small
transparencies mounted in sturdy frames ideally suited to magnification and
projection, since they have a very high resolution and a high image quality
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This means that the
slides will have to be inserted upside down in the projector tray
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Iyer
brought a slide projector
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(a) Based on the text and data given in the above paragraph, what kind of lens
must the slide projector have?
(b) If v is the symbol used for image distance and u for object distance then
𝑣

with one reason state what will be the sign for 𝑢 in the given case?
(c) A slide projector has a convex lens with a focal length of 20 cm
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How far away should the screen
be placed from the slide projector’s lens so that the slide is in focus?
OR
(c)When a slide is placed 15 cm behind the lens in the projector, an image is
formed 3 m in front of the lens
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(not to scale)



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