Question Bank: Gaseous State | Chemistry for JEE Main & Advanced PDF Download

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LEARNERS HABITAT
1] A gas is heated from 0
0
C to 100
0
C at 1.0 atm pressure. If the initial volume of the gas is
0L, its final volume would be:
a) 7.32 L b) 10.0 L c) 13.66 L d) 20.0 L
2] A certain sample of gas has volume of 0.2 litre measured at 1 atm pressure and 0
0
C. At
the same pressure but 273
0
C, its volume will be
a) 0.4 litres b) 0.0 litres c) 27.8 litres d) 55.6 litres.
3] If the density of a Gas A is 1.5 times that of B, then the molecular mass of A is M. The
molecular mass of B will be
a) 1.5 M b) M/1.5 c) 3 M d) M/3
4] Two separate bulbs contain ideal gases A and B respectively. Density of gas A is twice
that of gas B while mol. wt. of gas A is half that of gas B at the same temperature. The
pressure ratio p A/p B will be
a) 1/2 b) 1/4 c) 1 d) 4/1
5] Which of the following represents a plot of compressibility factor (Z) vs P at room
temperature for helium?
a) b) 
c) d) 
6] An ideal gas cannot be liquefied because
a) its critical temperature is always above 0
0
C
b) its molecules are relatively small in size
c) it solidifies before becoming liquid
d) forces operating between its molecules are negligible.
7] At constant volume for a fixed number of gas moles, the pressure of the gas increases
with the rise in temp. because of
a) increase in average molecular speed
b)increased rate of collisions amongst molecules
c) increase in molecular attraction
d) decreases in mean free path.
GASEOUS STATE
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LEARNERS HABITAT
1] A gas is heated from 0
0
C to 100
0
C at 1.0 atm pressure. If the initial volume of the gas is
0L, its final volume would be:
a) 7.32 L b) 10.0 L c) 13.66 L d) 20.0 L
2] A certain sample of gas has volume of 0.2 litre measured at 1 atm pressure and 0
0
C. At
the same pressure but 273
0
C, its volume will be
a) 0.4 litres b) 0.0 litres c) 27.8 litres d) 55.6 litres.
3] If the density of a Gas A is 1.5 times that of B, then the molecular mass of A is M. The
molecular mass of B will be
a) 1.5 M b) M/1.5 c) 3 M d) M/3
4] Two separate bulbs contain ideal gases A and B respectively. Density of gas A is twice
that of gas B while mol. wt. of gas A is half that of gas B at the same temperature. The
pressure ratio p A/p B will be
a) 1/2 b) 1/4 c) 1 d) 4/1
5] Which of the following represents a plot of compressibility factor (Z) vs P at room
temperature for helium?
a) b) 
c) d) 
6] An ideal gas cannot be liquefied because
a) its critical temperature is always above 0
0
C
b) its molecules are relatively small in size
c) it solidifies before becoming liquid
d) forces operating between its molecules are negligible.
7] At constant volume for a fixed number of gas moles, the pressure of the gas increases
with the rise in temp. because of
a) increase in average molecular speed
b)increased rate of collisions amongst molecules
c) increase in molecular attraction
d) decreases in mean free path.
GASEOUS STATE
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8] Five gram of each of the following gases at 87
0
C and 750 mm pressure are taken, which
of them will have least volume?
a) HF b) HCl c) HBr d) HI.
9] A rubber balloon permeable to all isotopic forms of hydrogen is filled with heavy
hydrogen and placed in tank of pure hydrogen. After some times, the balloon will
a) shrink in size b) expand
c) remain as such d) shrink to half of its size.
10] The volume occupied by 10.0 g of oxygen at 0
0
C and 2 atm pressure will be
approximately
a) 20 L b) 4.48 L c) 3.5 L d) 1.5L
11] 56 g of N 2 is mixed with 44 g of CO 2 in a container in which the total pressure at 20
0
 C
was
recorded as P atm. The partial pressure of N 2 in the container is
a) P atm b) P/3 atm c) P/2 atm d) 2P/3 atm.
12] 1000 ml of a gas A at 600 torr and 500 ml of gas B at 800 torr are placed in a 2L flask
without changing the temperature. The final pressure in atmosphere is
a) 2000 b) 1000 c) 500 d) 0.657
13] The gases A and B have molecular masses 64 and 100 respectively. If A effuses out of
porous plug at a rate of 15 ml s 
– 1
, the rate of effusion of other gas under similar
conditions will be
a) 12mL s 
– 1
b) 6 mL s 
– 1
c) 24 mL s 
– 1
d) 10 mL s 
– 1 
14] One litre of gas weight 2 g at 300K and 1 atm pressure. If the pressure is made 0.75 atm,
and temperature is brought down to 250 K, the gas will occupy a volume of
a) 2 L b) 1.11 L c) 2.22 L d) 0.7 L
15] Two gases X and Y have their molecular speeds in ratio of 3: 1 at certain temperature.
The ratio of their molecular masses Mx: My is
a) 1: 3 b) 3 : 1 c) 1 : 9 d) 9 : 1
16] 50 cm
3
 of a certain gas A (mol. Mass = 64) 3 diffuses through a porous plug in same time
as 40 cm
3
 of gas B (mol. mass = M) under similar conditions. The value of M is
a) 200 b) 160 c) 40.96 d) 100.
GASEOUS STATE
 
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