Gases - 12
1.
if pressure remains constant at what temp the volume of an ideal gas is double as compared to volume at O
o
C.
a) 273K
b) 273
o
C
c) -273
o
C
d) 546
o
C
2.
Equal volumes of H
2
and He are inserted in the same vessel. The pressure exerted by H
2
and He are in the ratio of
a) all above.
b) 2:1
c) 1:2
d) 1:1
3.
Which of the following have same no. of molecules at STP
a) all above.
b) 100cm
3
each of N
2
H
4
and O
2
c) 50cm
3
each of CO and N
2
d) 200 cm
3
each of CO
2
and N
2
O
4.
If absolute temp is doubled and the pressure is increased 4 times. The volume is.
a) double
b) half
c) remains unchanged.
d) four times
5.
Density of gas is usually expressed as
a) Kgm
-3
b) g cm
-3
c) Kgdm
-3
d) g dm
-3
6.
Units of gas constant R in SI system is
a) 82.1cm
3
atm K
-1
b) 8.31 Nm K
-1
mol
-1
c) 1.987 Cal K
-1
mol
-1
d) 0.0821 dm
3
K
-1
atm
-1
7.
The concept of distribution of velocities among the gas molecules was developed by.
a) Clausius
b) Boltz mann
c) Maxwell
d) Van der Waal.
8.
Absolute temp of a gas is proportion to.
a) Translation kintic energy
b) vibrational kinetic energy
c) rotational kinetic energy
d) Potential energy.
9.
Deviation a gas from ideal behaviour is maximum at.
a) low temp, high pressure
b) high temperature, low pressure
c) high temp, high pressure
d) low temp, low pressure
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