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788 s and p-Block Elements
76
...
In the preparation of sulphuric acid, V2 O5 is used in the reaction,
which is
[CBSE PMT 2001; AFMC 2001]
(a) S O 2 SO 2
(b)
2SO 2 O2 2SO 3
(c)
SO 2 H 2 O H 2 SO 4
(d) N 2 3 H 2 2 NH 3
Which of the following hydrides has the lowest boiling point
(c) Convert SO 2 to SO 3
90
...
[MP PET 1997]
78
...
(a)
H 2O
(b)
H2S
(c)
H 2 Se
(d)
H 2 Te
92
...
81
...
83
...
H 2 SO 4
(b)
Na 2 SO 4
(c)
(d)
P4 O10
Which shows polymorphism
[DCE 2000]
(a) O
(b) S
(c) Se
(d) All
All the elements of oxygen family are [MP PET/PMT 1998]
(a) Non-metals
(b) Metalloids
(c) Radioactive
(d) Polymorphic
The triatomic species of elemental oxygen is known as
93
...
C 2 F2
H 2 F2
(b)
(d)
88
...
(d)
(b)
Ba(OH )2
(c) KOH
(d) Zn
Which of the following group shows the highest boiling point
(a)
H 2O
(b)
H 2S
(c)
H 2 Se
(d)
H 2 Te
95
...
(a)
N2
(b) O 2
(c)
SO 2
(d)
Which of the following is formed by the action of water on sodium
peroxide
[Pb
...
PH 3
O2
(d) CO 2
Sulphur on boiling with NaOH solution gives
[Roorkee 1999]
(a)
Na 2 S 2 O3 NaHSO 3
(b)
Na 2 S 2 O3 Na 2 S
(c)
Na 2 SO 3 H 2 S
(d)
Na 2 SO 3 SO 2
98
...
(a) Silicon carbide
(b) Sodium silicate
(c) Silica
(d) Silicon
The most efficient agent for the absorption of SO 3 is
[AIIMS 2004]
[BHU 2004; DPMT 2004]
H 2 O2
C2 H 2
(a) Se Se
(b) Te Te
(c) S S
(d) O O
Which of the following is not a chalcogen
(a) O
(b) S
(c) Se
(d) Na
Which of the following is a suboxide [DPMT 2001]
(a) Ba2 O
(b) Pb2 O
C3 O2
H 2C2O4
In presence of moisture, SO 2 can
Which of the following bonds has the highest energy
(c)
H 2 SO 4 acts as dehydrating agent in its reaction with
[Pb
...
PMT 2000, 04]
[CBSE PMT 1996]
87
...
(a) Azone
(b) Polyzone
(c) Triozone
(d) Ozone
When H 2 S gas is passed through nitric acid, the product is
(a)
O2
[Kurukshetra CEE 1998]
[Kerala (Engg
...
(c)
N2
[MP PET 2002]
[Kerala (Med
...
(b)
MnO2
(c) S 4
(d) S 8
Which of the following is not suitable for use in a descicator to dry
substances
[AIIMS 1996]
CaCl 2
H2
(a)
[MP PMT 1996; MP PET/PMT 1998]
(a)
(a)
[JIPMER 2001]
The catalyst used in the manufacture of H 2 SO 4 by contact
process is
[UPSEAT 1999]
(a) Al2 O3
(b) Cr2 O3
(c) V2 O5
(d)
The molecular formula of sulphur is
(d) Test the presence of dust particles
Permono sulphuric acid is known as
[Bihar CEE 1995]
(a) Marshell's acid
(b) Caro's acid
(c) Sulphuric acid
(d) None of these
[CPMT 1997]
KO 2 CO 2 ? (gas)
100
...
H 2 SO 4 is diluted
[Pb
...
(d) None of the above
The smog is essentially caused by the presence of
[AIEEE 2004]
(a) Oxides of sulphur and nitrogen
(b) O 2 and N 2
(c)
O 2 and O 3
(d) O 3 and N 2
s and p-Block Elements
102
...
5
...
PMT 2004]
104
...
HNO 3 the gas evolved is
105
...
(b)
NO 2
7
...
the final product is
8
...
[Orissa JEE 2005]
107
...
n
(d)
R3 SiOH
R
R
|
|
Si O Si
|
|
O
O
Si O Si
|
|
Ozone deplict due to the formation of following compound in
Antarctica
[Kerala CET 2005]
(a) Acrolein
(b) Peroxy acetyl nitrate
(c) SO 2 and SO 3
(d) Chlorine nitrate
11
...
(d) CuO H 2 Cu H 2 O
Bromine is obtained on commercial scale from
(a) Caliche
(b) Carnellite
(c) Common salt
(d) Cryolite
Which one of the halogen acids is a liquid
(a) HF
(b) HCl
(c) HBr
(d) HI
Which one of the following acids is the weakest
13
...
(a) HClO
(b) HBr
(c) HClO3
(d) HCl
Chlorine reacts with sodium hydroxide under various condition to
give
[NCERT 1973]
(a) Sodium chloride
(b) Sodium hypochlorite
(c) Sodium chlorate
(d) All of these
Br2 gas turns starch iodide paper
[CPMT 1987; AFMC 1987; AMU 1999]
15
...
solution of KOH ,
following compound is formed
(b) HF HCl HBr HI
[CPMT 1971, 79; BVP 2003]
(a)
(c) HCl HF HBr HI
2
...
(a) Carbonyl chloride
(b) Phosphine
(c) Phosphorus oxychloride
(d) Phosphorus trichloride
The solubility of iodine in water increases in the presence of
KCl
(b)
KClO3
16
...
(a) Bleaching powder
(b) Sulphuric acid
(c) Nitric acid
(d) Chlorine
Which of the following is the weakest acid
[BHU 1979]
[CPMT 1974, 86; DPMT 1989; MP PMT 1994]
[BHU 1984, 86; CPMT 1988, 2000; MP PMT 1995;
MP PET 1989, 90; Kurukshetra CEE 1998;
Roorkee 2000; RPMT 2000]
[CPMT 1973, 74, 78, 86, 89, 91;
NCERT 1973; AFMC 1995]
4
...
(a) HF
(b) HCl
(c) HBr
(d) HI
Which is the most volatile compound
[CPMT 1979; AIIMS 1980; DPMT 1982;
Kurukshetra CEE 1998; J & K CET 2005; DPMT 2002]
[CPMT 1989; AFMC 1990; CBSE PMT 1996]
(a)
SO 32
(c)
S 4 O 62
(Tetrathionate)
[MP PMT 1985]
[MP PMT 1985]
Halogen family
The correct order of the thermal stability of hydrogen halides (H –
X) is [AIEEE 2005]
(a) HI HBr HCl HF
2 KBr I 2 2 KI Br2
[CPMT 1985]
(b) ( R3 Si O SiR3 )
(e) Formaldehyde
1
...
Bromine is liberated when an aqueous solution of potassium
bromide is treated with
[CBSE PMT 1989]
(a) Cl 2
(b) I 2
[CPMT 1984, 88, 89, 94]
[IIT-JEE (Screening) 2005]
(a)
6
...
20
...
[AIIMS 1982]
(a)
MP PMT 1986; RPMT 1997, 2002]
(a)
(c)
21
...
Na 2 SO 4
A quick supply of Cl 2 gas may be made by reacting crystals of
KMnO 4 with a concentrated solution of
(a) Br from NaBr solution
(b) F from NaF solution
(c) Cl from NaCl solution
(d) F from CaF2 solution
Hydrolysis of which of the following does not occur
35
...
23
...
25
...
(a) Potassium chloride
(b) Sodium chloride
(c) Bleaching powder
(d) Hydrochloric acid
The strongest acid amongst the following is
(a) HClO4
(b) HClO3
[MP PMT 1989; EAMCET 1992]
(a)
[IIT 1989]
(c) HClO2
(d) HClO
Iodine deficiency in diet causes
(a) Nightblindness
(b) Rickets
(c) Goitre
(d) Beri-beri
Which of the following is correct
[CPMT 1985]
(a) Iodine is a solid
(b) Chlorine is insoluble in water
(c) Iodine is more reactive than bromine
(d) Bromine is more reactive than chlorine
When KBr is treated with concentrated H 2 SO 4 redish brown gas
evolved, gas is
[Pb
...
37
...
(a)
(b)
Cl 2
38
...
40
...
30
...
F
(b)
Cl
41
...
[MP PMT 1990]
(b)
s2 p6
(c) s 2 p 4
Chlorine can remove
(d)
s2 p5
(a)
32
...
As the atomic number of halogens increases, the halogens
44
...
KI 2
(c) KI 2
(d) KI 3
Which reaction cannot be used for the production of halogen acid
(a) 2 KBr H 2 SO 4 K 2 SO 4 2 HBr
(c)
[MP PET 1990]
(b)
[MP PMT/PET 1988; Kurukshetra CEE 1998]
[CPMT 1982, 86, 2002; MP PET 2002]
(a) F
(b) I
(c) Br
(d) Cl
Which of the following is most active halogen
I
[EAMCET 1991]
s and p-Block Elements
(a)
(b)
(c)
(d)
45
...
They are all diatomic and form univalent ions
They are all capable of exhibiting several oxidation states
They are all diatomic and form divalent ions
They can mutually displace each other from the solution of
their compounds with metals
Mark the smallest atom
[CPMT 1984, 89]
(a) F
(b) Cl
(c) Br
(d) I
Mark the element which shows only one oxidation state
(c)
Br
(d)
I
(c)
Cl, Br, I
(b)
58
...
60
...
This is attributed to many factors except
61
...
(a) F
(b) Cl
(c) Br
(d) I
Which one of the following is the most basic
(a) I
(b) Br
(c) Cl
(d) F
Which of the following will displace the halogen from the solution
of the halide
[EAMCET 1979]
(a) Br2 added to NaCl solution
(b)
54
...
The liquid is
(a) Pure water
(b) H 2 SO 4 solution
63
...
H 2 SO 4
Chlorine can be manufactured from [CPMT 1989]
(a) Electrolysis of NaCl
(b) Electrolysis of brine
(c) Electrolysis of bleaching powder
(d) All of these
When chlorine water is exposed to sunlight, O 2 is liberated
...
65
...
(d) None of these
NaClO3
Chlorine is used in water for
[CBSE PMT 1988]
(a) Killing germs
(b) Prevention of pollution
(c) Cleansing
(d) Removing dirt
Chlorine cannot be used
[MP PET/PMT 1988]
(a) As bleaching agent
(b) In sterilisation
(c) In preparation of antiseptic
(d) For extraction of silver and copper
Chlorine acts as a bleaching agent only in presence of
[IIT 1983; DCE 2002]
[AIIMS 1987]
55
...
(d)
[CPMT 1981]
Fluorine is a better oxidising agent than Br2
...
Na 2 O 2
(c) NaCl solution in water
(d) CuCl 2 solution in water
(c) Br, Cl, I
(d) I, Cl, Br
Which of the following is strongest oxidising agent
[Pb
...
HF, O 2 and O 3
Cl
[EAMCET 1992]
50
...
HF and O 3
F
[CPMT 1978, 91, 94; MNR 1990; AMU 1983, 84;
MP PMT 1991, 92, 96; IIT 1992; UPSEAT 2000]
49
...
(a) The potential required for the discharge of the fluoride ions is
the lowest
(b) Fluorine reacts with most glass vessels
(c) Fluorine has great affinity for hydrogen
(d) Electrolysis of aqueous HF gives ozonised oxygen
Fluorine reacts with water to give
[BHU 1988, 89]
(a) HF and O 2
(b) HF and OF2
In which of the following, oxygen has + 2 oxidation number
(a) F2 O
(b) Cl 2 O
[BHU 1988; MP PET 2002]
47
...
791
(a) It is most electronegative element
(b) It forms only anions in ionic compounds
(c) It cannot form multiple bonding
(d) It shows non-bonded electron pair repulsion due to small size
In the isolation of fluorine, a number of difficulties were
encountered
...
68
...
The gas is
[AFMC 1987]
792 s and p-Block Elements
(a)
69
...
[CBSE PMT 1992]
(a)
(b)
Ca(ClO2 )2
CaCl 2
(c)
70
...
(d) C 2 H 4
Cl 2
In the manufacture of bromine from sea water, the mother liquor
containing bromides is treated with
82
...
[CBSE PMT 1992; MP PMT 2001; BHU 2002;
JIPMER 2002]
72
...
74
...
HCl
(c)
HBr
(d)
H2S
(a) Brown
(b) Violet
(c) Colourless
(d) Bluish green
Which of the following halogen oxides is ionic
(a) ClO2
(b) BrO2
76
...
H 2 SO 4 gives
77
...
(b)
I2
(c)
HIO3
(d)
KIO 3
The type of bonding in HCl molecule is
[AIIMS 1992]
(a) Pure covalent
(b) Polar covalent
(c) Highly covalent
(d) H-bonding
HCl is a gas, but HF is a low boiling liquid
...
80
...
H 2 SO 4 on KI
because
[MNR 1984]
HI is stronger than H 2 SO 4
(b)
HI is more volatile than H 2 SO 4
(c)
H 2 SO 4 is an oxidising agent
(d)
H 2 SO 4 forms complex
HI
(d) C 2 H 5 OH
HBr and HI reduce sulphuric acid, HCl can reduce KMnO 4
and HF can reduce
[IIT 1981; MP PET 1993]
(a) H 2 SO 4
(b) KMnO 4
85
...
This is due to the reason that [NCERT 1980]
(a) Water is a good conductor of electricity
(b)
(d)
HCl
HI
[Bihar MEE 1996; MP PET/PMT 1998;
NCERT 1974; CPMT 1976, 90]
86
...
(a) HF
(b) HCl
(c) HBr
(d) HI
Which of the following hydrogen halides has the highest boiling
point
[AIIMS 1980; DPMT 1983; MP PMT 1989]
(a) HF
(b) HCl
(c) HBr
(d) Hi
Hydrogen bonding is present in
[MP PMT 1989; DPMT 1990; Roorkee 1995]
(a)
(c)
HF
HBr
(b)
(d)
HCl
HI
88
...
(a) SP 3
(b) SP 2
(c) SP
(d) None of these
Which one is the anhydride of HClO4
[
[AIIMS 1983; BHU 1983; AMU 1984]
(a)
Cl 2 O
(b) ClO2
(c)
Cl 2 O 6
(d) Cl 2 O7
90
...
(a) Chlorine
(b) Iodine
(c) Bromine
(d) Fluorine
Which of the following chemical contains chlorine
[MP PET 1999]
HF is a weak acid
(a)
(c)
H 2O
(a) HF
(c) HBr
Mark the strongest acid
[MP PET/PMT 1988]
HI
(b)
(d) None of these
K 2 Cr2 O7
Which has the highest molar heat of vaporisation
I4 O9
(a)
NH 3
[CPMT 1991]
A salt, which on heating with conc
...
[AFMC 1993]
75
...
H 2 SO 4 and solid
potassium dichromate gives
[CPMT 1981, 84]
(a) Chromic chloride
(b) Chromyl chloride
(c) Chromous chloride
(d) None of these
Hydrogen bonding does not play any role in boiling of
92
...
(a) Fischer salt
(b) Epsom salt
(c) Fremy's salt
(d) Spirit of salt
The element which never acts as reducing agent in a chemical
reaction is
[Bihar CEE 1995]
(a) O
(b) Li
(c) F
(d) C
Concentrated HNO 3 reacts with I 2 to give
[IIT 1989; Roorkee 1995; JIPMER 2001]
(a)
(c)
HI
HOIO3
(b)
(d)
HOI
HOIO3
s and p-Block Elements
94
...
Which of them will
combine further with fluorine
[NCERT 1977]
(a) IF5
(b) NaF
(c)
95
...
CaF2
(d)
Which one below is a pseudohalide
107
...
Which one is highest melting halide
97
...
(a) Minimum ionic character
(b) Maximum ionic character
(c) Highest oxidising power
(d) Lowest polarity
Which of the following oxidizes H 2 O to oxygen
109
...
[MP PET 1994]
111
...
102
...
113
...
114
...
It can be
synthesized by the action of
[RPET 2003]
(a) NaCl with H 2 O
(b)
NH 4 Cl with NaOH
(c)
Cl 2 with cold and dilute NaOH
Metal halide which is insoluble in water is
(a) AgI
(b) KBr
CaCl 2
(d)
Na 2 S
(b)
NaI
Na 2 S 4 O6
(d)
S2
Which one among the following non-metals liquid at 25 o C
[MP PMT 1999]
115
...
[Bihar CEE 1995]
H 2 SO 4 on potassium iodide because
(b)
(d)
Sn
F2
Beilstein test is used for
(a) N 2
(a)
HI is stronger than H 2 SO 4
(b)
Cl
(b)
HI is more volatile than H 2 SO 4
(c)
(d)
CO 2
(c)
H 2 SO 4 is an oxidising agent
(d)
H 2 SO 4 forms complex
Ca
S
Na
116
...
Chlorine dioxide is best prepared by passing dry
[Kerala PMT 2003]
(a)
(b)
(c)
(d)
(e)
Chlorine gas over hot HgO
Chlorine and oxygen gas over hot pt catalyst
Hydrogen chloride and oxygen over silver oxide
Hydrogen chloride over phosphorus pentoxide
Chlorine over hot silver chlorate
[AIIMS 1996]
AgF
[BHU 2003]
Which of the following is prepared by electrolytic method
(a)
106
...
(a) HF is a stronger acid than HCl
(b) Among halide ions, iodide is the most powerful reducing agent
(c) Fluorine is the only halogen that does not show a variable
oxidation state
(d) HOCl is a stronger acid than HOBr
The correct order of acidic strength
[Pb
...
) 2002]
(a)
(c)
(c) Cl
(d) All
Which of the following statements is not true
[DPMT 2002]
[KCET 2002]
(a) Chlorine
(b) Bromine
(c) Aluminium
(d) Calcium
The effective component of bleaching powder is
...
(b) Cl
(c)
(a) Chlorine
(b) Fluorine
(c) Bromine
(d) Iodine
The bleaching action of the bleaching powder is due to the
liberation of
[MP PMT 1994]
(a) Chlorine
(b) Molecular oxygen
(c) Nascent oxygen
(d) Calcium carbonate
Which of the following element is extracted commercially by the
electrolysis of an aqueous solution of its compound
(c)
N 2 O4
[CBSE PMT 2003]
[AIIMS 1982]
(a)
(d)
[UPSEAT 2003]
(a) NaCl
(b) NaBr
(c) NaF
(d) NaI
The above answer is correct because the chosen halide has
100
...
The mixture of concentrated HCl and HNO 3 made in 3 : 1 ratio
contains
[AIIMS 2003]
(a) ClO2
(b) NOCl
(c)
[AIIMS 1982]
793
118
...
White enamel of our teeth is
(a) Ca 3 (PO4 )2
(b) CaF2
(c)
(d) CaBr2
CaCl 2
[Bihar CEE 1995]
The least active halogen with hydrogen is
[DPMT 1996]
(a) Cl
(b) I
(c) Br
(d) F
Iodine dissolves readily in
[BHU 1996]
(a) Water
(b) Potassium iodide
(c) Carbon tetrachloride
(d) Alcohol
794 s and p-Block Elements
120
...
[EAMCET 1997]
(a)
(c)
121
...
(b)
(d)
NaCl
MgCl2
I 2 HI ICl HIO4
(d)
(d) None of these
Which is the strongest of the following acids
(a) HClO4
(b) H 2 SO 4
133
...
In this respect it resembles
[JIPMER 1999]
HI I 2 ICl HIO4
134
...
PMT 1998; AFMC 1998;KCET 2000; Orissa JEE 2005]
123
...
Hg(CN )2
(a) HF HCl HBr HI
(a) (CN )2
(b) HCl HBr HF HI
(b) Addition compound HgCl2
...
The weakest acid HX (X = F, Cl, Br, I) is
(b) Caliche
(a) HF
(b) HCl
(c) Carnallite
(c) HBr
(d) HI
(d) Iodine never exists as sodium iodate
136
...
126
...
(a)
Na 2 S
(b)
Na 2 SO 4
(c)
Na 2 S 4 O6
(d)
Na 2 SO 3
Bleaching powder is correctly represented as
(a)
128
...
130
...
137
...
[RPMT 1997]
Pb2 (NO 3 )4 MnO2
(d)
K 2 Cr2 O7 HCl
(a)
AgCl
(b)
AgBr
(c)
AgI
(d)
AgNO3
Which of the following halogen does not exhibit positive oxidation
state in its compounds
(a)
140
...
(d) None of these
Bleaching powder is obtained by treating chlorine with
[Pb
...
(a)
CaO
(b) CaCO 3
(c)
CaSO 4
(d) Ca(OH )2
Which statement is not true
(a) Ni (CO )4 is diamagnetic
(b)
[CPMT 1997]
(b) It gives chlorine
(c) It gives bromine
[KCET 2002]
Which of the following silver compounds finds maximum use in
photography
[JIPMER 1999]
(a)
(a) It gives mixture of F2 , Cl 2 and Br2
[BHU 2000]
[EAMCET 1997; AIIMS 2000]
CaO
A one litre flask is full of brown bromine vapour
...
(c) CaO(Cl)
(d) CaCl(OCl)
When chlorine reacts with cold and dilute solution of sodium
hydroxide, the products obtained are [CBSE PMT 1998]
[JIPMER 1999]
143
...
(b) It changes into calcium chloride and calcium hydroxide
(c) It absorbs moisture
(d) It changes into calcium chloride and calcium chlorate
The compound which forms a dative bond with ammonia
156
...
CCl 4
(b)
(c) HF
(d) None
Cl 2 reacts with CS 2 in presence of I 2 catalyst to form
[AFMC 1995]
[JIPMER 2001]
(a)
795
BCl 3
(c) MgCl2
(d) NaCl
The bleaching action of bleaching powder is due to the formation of
157
...
Maximum and minimum
ionic character will be shown by the compounds
[RPMT 1999]
[Roorkee 1999]
CaSO 4
(a)
(c) HClO
(d)
Fluorine with dilute NaOH gives
(a) OF2
(b)
Ca(ClO3 )2
(c)
(c)
HF and O 2
(a)
146
...
CaCl 2
O2
149
...
O3
Which is not oxidised by MnO2
(a) F
(c) I2
148
...
(b) Cl
(d) I
Bromine water reacts with SO 2 to form
[AFMC 1995]
(a)
H 2 O and HBr
(b)
H 2 SO 4 and HBr
(c)
HBr and S
(d)
S and H 2 O
160
...
(a)
2 KI Br2 2 KBr I2
(b)
2 H 2 O 2 F2 2 HF O2
(c)
2 KBr I2 2 KI Br2
(d)
2 KBr Cl2 2 KCl Br2
Which of the following has the lowest solubility
162
...
152
...
)
(c)
NaCl and H 2 SO 4 (conc
...
) and KMnO 4
Concentrated H 2 SO 4 cannot be used to prepare HBr from
(a) Reduces HBr
154
...
164
...
H 2 SO 4 , the gas comes out
is
[JIPMER 2000]
(a) O 2
(b) Cl 2
(c) CrOCl2
Aqua regia is a mixture of
(a) 3 HCl 1HNO 3
3 HNO 3 1HCl
(d) CrO2 Cl 2
[KCET (Med
...
163
...
LiCl, MgCl2
[IIT 1995]
(b) Oxidises HBr
(c) Disproportionates HBr
(d) Reacts slowly with NaBr
Which of the following halides is least stable and has doubtful
existence
[IIT 1996]
(a) CI 4
(b) GeI 4
(c) SnI 4
(d) PbI4
Chlorine cannot displace
[MP PET 1996]
(a) Fluorine from NaF
(b) Iodine from NaI
(c) Bromine from NaBr
(d) None of these
When fluoride is heated with conc
...
(a)
F2
(b) Cl 2
(c)
Br2
(d)
I2
To purify fluorine gas, fumes of HF are removed by
[MH CET 2002]
166
...
(a) Solid NaF
(b)
H 2 gas
(c) Solid KHF2
(d) None of these
Fluorine is prepared by
(a) Oxidation of HF
(b) Electrolysis of KF
(c) Electrolysis of fused KHF2
(d) Decomposition of HgF2
Amongst halogens fluorine is most oxidising because
(a) Fluorine has highest electron affinity
(b) Fluorine is most electronegative
(c) Dissociation energy for fluorine molecule is lowest
796 s and p-Block Elements
168
...
(d) All are correct
The alkali metal halides are soluble in water but LiF is insoluble
because
(a) It is amphoteric
(b) The Li F bond is highly ionic
(c) Its lattice energy is high
(d) Li ion is least hydrated
In which of the following pairs does the first gas bleaches flowers by
reduction while the second gas does so by oxidation
(a) CO and Cl 2
(b) SO 2 and Cl 2
(c)
170
...
[CPMT 2004]
(c)
181
...
[BHU 2002]
172
...
Iodine is released when potassium iodide reacts with
[UPSEAT 1999]
(a)
(b)
ZnSO 4
CuSO 4
184
...
186
...
Cl 2 O7
(b) Cl 2 O5
Cl 2 O3
(d)
HClO
I2 dissolves in KI solution due to the formation of
[CPMT 2004]
ClO2
Cl 2 O7
For which one of the following properties of halogens the sequence
[MP PET/PMT 1998]
F Cl Br I holds good
(a) Electron affinity
(b) Electronegativity
(c) Atomic radius
(d) Boiling point
Which of the following properties increases on going down from F
to I in Group VII-A of the periodic table ?
(a) Fluorine
(b) Iodine
(c) Chlorine
(d) Bromine
The reaction of the type 2 X 2 S SX 4 is shown by sulphur
when X is
[DCE 2003]
(a) Fluorine or chlorine
(b) Chlorine only
(c) Chlorine and bromine only
K , I and I2
(a)
KI2 and I
(b)
(c)
KI3
(d) None of these
Noble gases
1
...
NH 3
KMnO4
[CPMT 2004]
[MP PMT 1997]
178
...
H 2 SO 4
(c)
(a)
176
...
(b)
[DPMT 2004]
(d) Either MnO 2 or KMnO 4
174
...
Cl2 , Br2 and F2 are evolved
[Pb
...
F, Cl, Br all
(a)
ns
2
2
...
4
...
6
...
8
...
10
...
12
...
14
...
16
...
(c) 0
Helium was discovered by
(a) Crooks
(c) Frankland and Lockyer
The inert gases are
(a) Polyatomic
(c) Diatomic
(d) None of these
(b) Rutherford
(d) Dorn
21
...
(a) Argon
(b) Neon
(c) Helium
(d) Xenon
Least chemical activity is shown by
[CPMT 1973, 79]
(a) Nitrogen
(b) Argon
(c) Methane
(d) Ammonia
Noble gases do not react with other elements because
1s 2 , 2 s 2 2 p 6 , 3s 2
(b) 1s 2 , 2 s 2 2 p 6 , 3s 1
(c) 1s 2 , 2s 2
(c) 1s 2
The colour discharge tubes for advertisement mainly contain
(c)
[CPMT 1980, 89; MP PET 2002]
19
...
[CPMT 1982; Kurukshetra CEE 1998;RPET 1999]
The charcoal maintained at 100 o C absorbs
(a) XeF6
(b) XeF4
(a) Ne and Kr
(b) He and Ar
(c) Ar, Kr, Xe
(d) He and Ne
(c) XeF3
(d) XeF2
Every inert gas atom
23
...
[AFMC 1995]
XeF4 on partial hydrolysis produces
(c) Jansen
(d) Ramsay
(a) XeF2
(b) XeOF2
Deep sea divers used to respirate is a mixture of
(c) XeOF4
(d) XeO 3
(a) Oxygen and argon
(b) Oxygen and helium
(c) Oxygen and nitrogen
(d) Oxygen and hydrogen
25
...
CET 2003]
(a) sp 2
(b) sp 3 d
(a) Ar
(b) He
(c) sp 3
(d) sp 3 d 2
(c) Xe
(d) Ne
26
...
) 2002]
the others
(a) Xe
(b) Ar
[BHU 1982; DPMT 1982,02; CPMT 1983, 89;
EAMCET 1993; Manipal MEE 1995; MHCET 2003]
(c) Ne
(d) He
(a) Helium
(b) Neon
27
...
Helium is added to the oxygen supply used by deep sea divers
(c) Neon
(d) Oxygen
because
[MP PMT 1993; MP PET 1997]
Nuclear fusion produces
(a) It is less soluble in blood than nitrogen at high pressure
(a) Argon
(b) Deuterium
(b) It is lighter than nitrogen
(c) Helium
(d) Krypton
(c) It is readily miscible with oxygen
Among the fluorides below, the one which does not exist is
(d) It is less poisonous than nitrogen
[NCERT 1977; CPMT 1988]
29
...
8 days
[CPMT 1971, 78]
(d) He is used in producing very low temperature
(a) 6
(b) 2
30
...
CET 2000
The electronic configuration of neon is
NCERT 1979; IIT Screening 1993; EAMCET 1993]
(a)
18
...
32
...
(b) Ion-dipole forces
(c) London dispersion forces
(d) Magnetic forces
Which of the following is the correct sequence of the noble gases in
their group in the periodic table
44
...
(a) Ar, He, Kr, Ne, Rn, Xe
(b) He, Ar, Ne, Kr, Xe, Rn
(c) He, Ne, Ar, Kr, Xe, Rn
(d) He, Ne, Kr, Ar, Xe, Rn
Which of the following represent nobel gas configuration
45
...
5 s 2 5 p 6 5 d 1 ,6 s 2
1s 2 , 2 s 2 2 p 6 , 3 s 2 3 p 6 3d 10 , 4 s 2 4 p 6 4 d 10 ,
47
...
XeF6 on hydrolysis gives
[MP PET 2000; Pb
...
(a)
XeO 3
(b)
XeO
(c)
XeO 2
(d)
Xe
(c)
He Ne Ar Kr Xe
Ne Ar Kr He Xe
Xe Kr Ar Ne He
(d)
Ar Ne He Kr Xe
(b)
37
...
49
...
41
...
43
...
Which of the following has sp
(d)
3
[MP PMT 1994]
Ne
Xe
hybridisation
(a)
XeO 3
(b)
BCl 3
(c)
XeF4
(d)
BBr3
[DCE 2001]
Which element out of He, Ar, Kr, and Xe forms least number
of compounds
[MP PMT 1995]
He
(b)
Ar
(c) Kr
(d) Xe
Which of the following exhibits the weakest intermolecular forces[KCET (Med
...
[Kerala (Med
...
XeF4
(c)
The correct order of solubility in water for He, Ne , Ar, Kr, Xe, is
(a)
(b)
(a)
(d) 1s 2 , 2 s 2 2 p 6 , 3 s 2 3 p 6 3d 10 , 4 s 2 4 p 6 4 d 10
35
...
53
...
CET 2002]
54
...
(a) Ne
(b) He
(c) Kr
(d) All of these
Which one of the following statements regarding helium is incorrect
(a) It is used to produce and sustain powerful superconducting
magnets
(b) It is used as a cryogenic agent for carrying out experiments at
low temperatures
(c) It is used to fill gas balloons instead of hydrogen because it is
lighter and non-inflammable
(d) It is used in gas-cooled nuclear reactors
Which of the following inert gas liquifies easily
[Pb
...
(b) He
(d) Ar
The oxidation number of xenon in XeOF2 is
(a) Zero
(b) 2
[J & K 2005]
s and p-Block Elements
57
...
59
...
(c) 4
(d) 3
Which inert gas having highest boiling point
(a) Xe
(b) Ar
(c) Kr
(d) He
Which of the following is an inert gas [AFMC 2005]
(a)
H2
(b)
(c)
N2
(d) Argon
XeO 2 F2
(d)
7
...
[DPMT 2005]
[J & K 2005]
XeF4
9
...
2
...
The correct sequence in decreasing order of the percentage of
nitrogen in the given compounds is
[NDA 1999]
(a) Urea > Ammonium chloride > Ammonium nitrate > Ammonium
nitrite
(b) Urea > Ammonium nitrate > Ammonium nitrite > Ammonium
chloride
(c) Urea > Ammonium nitrite > Ammonium nitrate > Ammonium
chloride
(d) Urea > Ammonium nitrite > Ammonium chloride > Ammonium
nitrate
As the alkaline earth metals (except Be) tend to lose their valence
electrons readily they act as
[Kerala (Med
...
This is because
10
...
(a) There is increases in the nuclear charge of the alkaline earth
metals
(b) There is decreases in the nuclear charge of the alkaline earth
metals
(c) There is no change in the nuclear charge
(d) None of these
Lead is maximum in
[BVP 2004]
(a) Soda glass
(b) Jena glass
(c) Pyrex glass
(d) Flint glass
BaSO 4 and carbon on heating reacts to produce
[Pb
...
(a)
Ba SO 2 CO 2
(b)
BaS CO
(c)
BaS O2 SO 2
(d)
BaCO3 S O2
The atomic radii of alkali metals (M) lie in the order
Li Na K Rb but the radii of M ions in aqueous solution
lie in the reverse order Li Na K Rb
...
The explanation for it is that
(a) Concentrated hydrochloric acid emits strongly smelling HCl
gas all the time
(b) Oxygen in air reacts with the emitted HCl gas to form a
cloud of chlorine gas
(c) Strong affinity of HCl gas for moisture in air results in
forming of droplets of liquid solution which appears like a
cloudy smoke
(d) Due to strong affinity for water, concentrated hydrochloric acid
pulls moisture of air towards itself
...
(c) Increasing electropositive character
(d) Decreasing degree of hydration
Fusion mixture is
[CPMT 2002]
(a) Na 2 CO 3 K 2 CO 3
(b) Na 2 CO 3 NaHCO 3
(c)
O2
Which of the following is most polarised
(a) Kr
(b) He
(c) Ar
(d) Xe
Which of the following is planar
(a) XeF2
(b) XeO 3 F
(c)
[BCECE 2005]
799
11
...
(a)
CO 2
(b)
(c)
SnO 2
(d) CaO
Concentrated aqueous sodium hydroxide can separate mixture of
(a)
13
...
Al 3 and Sn 2
(b)
Al 3 and Fe 3
(c) Al 3 and Zn 2
(d) Zn 2 and Pb 2
The composition of the common glass is
[DCE 2004]
(a) Na 2O
...
6 SiO3
(b) Na 2O
...
SiO2
(c)
14
...
Al2O3
...
CaO
...
What is the correct relationship between the pHs of isomolar
solutions of sodium oxide ( pH1 ), sodium sulphide ( pH 2 ), sodium
[CBSE PMT 1995]
selenide ( pH 3 ) and sodium telluride ( pH 4 )
[CBSE PMT 2005]
(a)
pH1 pH 2 pH 3 pH 4
(b)
pH1 pH 2 pH 3 pH 4
(c)
pH1 pH 2 pH 3 pH 4
28
...
[KCET 2004]
(a)
HNO 3
(b)
29
...
(c)
(d) NH 3
H 2O
Which group is called buffer group of the periodic table
19
...
30
...
(b)
(d) I 2
Br2
Calcium cyanide on treatment with steam under pressure gives
[DPMT 2002]
NH 3 and
(a)
CaHCO 3
(b)
24
...
volumes of
ozone
[DPMT 2000]
(a) 4
(b) 3
(c) 2
(d) 6
The substance not likely to contain CaCO 3 is
[AIEEE 2003]
25
...
34
...
36
...
I3
(b)
(d)
Philospher's wool when heated with BaO at 1100 o C gives a
compound
...
I2
MgO and Mg 3 N 2 both
(a) Alkaline solution of pyrogallol
(b) Conc
...
MgCO3
[MP PET/PMT 1998; RPMT 2000; JIPMER 2002]
CaO
(c)
23
...
Mg 3 N 2
(a)
[CPMT 1988; MP PMT 1990]
F2
(b)
(c)
32
...
CET 2004]
20
...
This is due to
Nitrogen is liberated by the thermal decomposition of only
[IIT 1991]
37
...
39
...
Which is the false
statement
[DPMT 2000]
(a) Due to its marked tendency to form long chains (catenation)
(b) Due to its unique ability to form multiple bonds
(c) Due to d-orbital in penultimate shell
(d) Due to its limitation of co-ordination number 4
Which of the following oxide does not form acidic aqueous solution
(a)
(c)
40
...
42
...
51
...
HCl and potassium chlorate on heating gives [Roorkee 200
[CPMT 2004]
NO 2
Which of the following is in the increasing order of the ionic
character
[JIPMER 2002]
52
...
KO 2 (potassium superoxide) is used in oxygen cylinders in space
and submarines because it
[AIEEE 2002]
(a) Absorbs CO 2 and increases O 2 content
Which of the above, if any, is wrong
(a) (iv)
(b) (iii)
(c) (i)
(d) None of these
Increasing order of solubility is
(a) CaCO 3 , KHCO 3 , NaHCO 3
(b)
NaHCO 3 , KHCO 3 , CaCO 3
(c)
KHCO 3 , NaHCO 3 , CaCO 3
54
...
45
...
47
...
H2S
(b)
HgCl2
(c)
Ca(NO 3 )2
(d)
CaF2
Which of the following halides is most acidic
(a)
PCl 3
(b)
SbCl 3
(c)
BiCl3
(d)
CCl 4
LiCl KCl NaCl CsCl
(b)
(c)
CsCl KCl NaCl LiCl
NaCl KCl LiCl CsCl
(d)
KCl CsCl NaCl LiCl
56
...
49
...
Identify the correct order
...
Its name
and basicity are respectively
[CBSE PMT 1992; BHU 1999; KCET 1999]
The reaction of Na 2 S 2 O 3 with iodine gives
[CPMT 1971, 80, 81; DPMT 1983, 90;
MP PMT 1985; EAMCET 1990; BHU 1980]
48
...
H 2 SO 3 is formed
(d) None of these
(a)
Silicon chloroform is prepared by
801
58
...
N 2 O3
[MP PET/PMT 1988]
NO 2
Nessler's reagent is
(a) Potassium in mercuric iodide
(b) TiCl4
(b)
N 2O
(d)
N 2 O5
[CPMT 2002]
802 s and p-Block Elements
(c) Anhydrous AlCl3
(d)
60
...
Al2 O3 / Cr2 O3
The ratio of
Cp
Cv
65
...
67
...
13
(d) 1
...
CET 2003]
(a)
SiF3
(b)
H 4 SiO4
(c)
H 2 SO 4
(d)
H 2 SiF4
Ozone with dry iodine give
[Pb
...
(a) Red
(b)
(c) Pale yellow
(d)
Which of the following gas mixture is
sea
(a) O 2 He
(b)
O 2 Ar
4
...
7
...
Amongst the halogens fluorine can oxidise the
elements to highest oxidation state
...
Hence reverse
reaction takes place more easily
...
Reason
:
In HNO 3 there are two nitrogen-to-oxygen
Assertion
:
Reason
:
bonds whereas in HNO 2 there is only one
...
Hydrogen bonding is present in ammonia
...
Due to the strong electronegativity of fluorine
...
The bleaching action of chlorine and sulphur
dioxide is performed through the process of
oxidation
...
In nitrogen molecule, there is extensive
delocalization of electrons
...
Reason
:
Dinegative anion of oxygen (O 2 ) is quite
[Pb
...
[Pb
...
PMT 2004]
(b)
Sulphate is estimated as BaSO4 and not as
[IIT 1998]
Na(NH 4 )H 2 O
Fe2 O3 Al2 O3
2
...
(a)
Thermite is a mixture of
(a) Cr2 O3 Al2 O3
:
MgSO4
...
71
...
1
...
CET 2002]
64
...
If both assertion and reason are true but reason is not the correct
explanation of the assertion
...
If the assertion and reason both are false
...
[DCE 1999]
NaH 2 PO2
...
(a)
for inert gases is
(a) 1
...
66
62
...
[AFMC 2004]
Assertion
:
Reason
:
Assertion
:
Reason
:
Assertion
Reason
Assertion
Reason
Assertion
:
:
:
:
:
common but dinegative anion of sulphur (S 2 )
is less common
...
The catenated O O O changes are less
stable as compared to O O molecule
...
Potassium and caesium emit electrons on
exposure to light
...
F F bond has low bond dissociation energy
...
Halogens are highly reactive
...
Reason
:
N 2 molecule have unpaired electrons
...
One mole of magnesium nitride on the reaction with an excess of
water gives
[AIEEE 2004]
(a) Two moles of ammonia
(b) One mole of nitric acid
(c) One mole of ammonia
(d) Two moles of nitric acid
Calcium cyanamide on treatment with steam produce
10
...
PMT 2004]
(a)
CaCO 3 NH 3
(b)
CaHCO 3 NH 3
(c)
CaO NH 3
(d)
Ca(OH )2 NH 3
11
...
13
...
Assertion
:
Liquid NH 3 is used for refrigeration
...
32
...
16
...
Assertion
:
Reason
Assertion
Reason
Assertion
Reason
:
:
:
:
:
Al(OH )3 is insoluble in NH 4 OH but soluble
in NaOH
...
[AIIMS 1997]
Boron is metalloid
...
[AIIMS 1997]
Inert gases are monoatomic
...
33
...
35
...
19
...
During burning heat evolved do not decompose
NO
...
Reason
:
Hydrated BaO2 is not available
...
Reason
:
Inorganic benzene is, borazine, B3 N 3 H 6
...
All halogens are coloured
...
38
...
[AIIMS 2003]
Assertion
:
The O O bond length in H 2 O2 is shorter
[AIIMS 2001]
20
...
37
...
22
...
than that of O2 F2
...
Reason
:
H 2 O2 is an ionic compound
...
Reason
:
Iodide stabilizes higher oxidation state
...
Assertion
Reason
:
:
Mg is not present in enamel of human teeth
...
Assertion
Reason
Assertion
Reason
:
:
:
:
28
...
Reason
Assertion
:
:
Reason
:
Assertion
:
Reason
:
Assertion
:
Reason
:
24
...
30
...
Assertion
:
Reason
:
Helium and beryllium have similar outer
electronic configuration of the type ns 2
...
Assertion
:
Na 2 SO 4 is soluble while BaSO4 is insoluble
...
Alkali metals impart colour to the flame
...
Superoxides of alkali metals are paramagnetic
...
Assertion
:
Although PF5 , PCl5 and PBr3 are known, the
pentahalides of nitrogen have not been observed
...
Assertion
:
The electronic structure of O3 is
+
O
...
O
O
...
Reason
:
functions of human
...
s-block elements are non-radioactive in nature
...
Electronegativity difference between Li and Cl is
too small
...
2p-orbital is lower in energy than 2s-orbital
...
The alkali metals have low electronegativity, their
hydrides conduct electricity when fused and
liberate hydrogen at the anode
...
Due to its very high ionization energy, beryllium
requires a large amount of energy for excitation
of the electrons
...
Potassium vapourises at the melting point of KCl
...
O
...
O
O
...
Structure is not allowed because octet around O
cannot be expanded
...
Concentrated sulphuric acid has a great affinity
for water
...
Reason
:
PCl5 in solid state consists of tetrahedral
[AIIMS 2003]
[AIIMS 2003]
803
PCl4 cation and octahedral PCl6 anion
...
Assertion
:
Among nitrogen halides
NX 3 , the dipole
moment is highest for NI 3 and lowest for NF3
...
Assertion
Reason
:
:
42
...
White phosphorus is stored under water
...
Al forms [AlF6 ]3 but B does not form
[BF6 ]3
...
Reason
:
B does not react with F2
...
Reason
:
N in NO 3 is sp 2 hybridized but in NH 3 it
is sp 3 hybridized
...
45
...
Si Si bonds are much stronger then Si O
bonds
...
Assertion
:
Reason
:
Assertion
:
The S S S bond angle in S 8 molecule is
105°
...
Assertion
:
Caro's acid has S atom in +6 oxidation state
...
48
...
Reason
:
Caro's acid contains one peroxo O 22 group
...
p
...
p
...
The interparticle forces among noble gases in
their liquid state are covalent forces
...
Reason
:
S
atom
in
both
63
...
49
...
50
...
Xenon forms fluorides
...
Hydrogen cannot be prepared in laboratory
...
Diprotium shows relatively inert behaviour at
room temperature
...
Water can be transformed from liquid to solid
state only
...
Ice is less dense than water
...
HF, NH 3 and H 2 O form intermolecular
hydrogen bonding
...
Hard water does not lather with soap
...
H 2 O2 is stored in wax-lined glass
...
53
...
55
...
57
...
Assertion
Reason
Assertion
:
:
:
Reason
:
Assertion
Reason
:
:
Assertion
:
Reason
:
Assertion
Reason
59
...
:
:
Presence of metal surfaces, traces of alkali
(present in glass) etc
...
A nearly tetrahedral arrangement of the orbitals
about the oxygen atom allows each water
molecule to form hydrogen bonds with as many
as four neighbouring water molecules
...
2
and Mg
2
Assertion
:
Calgon is used for removing Ca
ions from hard water
...
Assertion
:
Reaction of SO 2 and H 2 S in the presence of
Fe2 O3 catalyst gives elemental sulphur
...
Borax bead test is not suitable for Al(III)
...
Assertion
:
SeCl 4 , does not have a tetrahedral structure
...
Assertion
:
Ozone is a powerful oxidizing agent in
comparison to O 2
...
[AIIMS 2005]
is
2
51
...
SO 2 and
Assertion
Alkali metals
1
b
2
c
3
a
4
b
5
a
6
b
7
c
8
a
9
c
10
d
11
c
12
b
13
a
14
d
15
a
16
b
17
c
18
b
19
b
20
b
21
a
22
b
23
b
24
a
25
d
26
b
27
b
28
d
29
c
30
c
31
d
32
a
33
b
34
a
35
d
36
b
37
a
38
a
39
d
40
b
41
d
42
c
43
b
44
d
45
d
46
b
47
b
48
b
49
c
50
c
51
d
52
c
53
d
54
d
55
a
56
c
57
a
58
c
59
d
60
a
61
b
62
b
63
a
64
a
65
c
66
b
67
d
68
a
69
d
70
d
71
c
72
a
73
a
74
c
75
b
76
d
77
c
78
a
79
b
80
a
81
d
82
a
83
c
84
b
85
c
86
c
87
d
88
b
89
c
90
a
91
c
92
a
93
c
94
a
95
c
96
a
97
a
98
b
99
d
100
c
101
a
102
d
103
b
104
c
105
c
106
a
107
c
108
b
109
b
110
d
111
d
112
c
113
a
114
c
115
a
116
a
117
c
118
c
119
b
120
a
121
b
122
c
123
c
124
c
125
d
126
c
127
a
128
b
129
a,b
130
b
131
d
132
b
133
d
134
d
135
b
136
d
137
d
138
a
139
a
140
b
Reason
:
SO 2 is a reducing agent
...
141
c
142
c
143
a
144
a
145
b
Reason
:
Size of fluorine is small and its lone pair of
146
electrons interacts with d-orbitals of Si strongly