At STP the mass of one litre of air is 1.293 gm. The value of the specific gas constant will be :

1. 0.29 J/K-gm

2. 4.2 J/K-gm

3. 8.3 J/K-gm

3. 16.5 J/K-gm

Concept Questions :-

Specific heat
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The pressure P, volume V and temperature T of gas in the jar A and the other gas in the jar B at pressure 2P, volume V/4 and temperature 2T, then the ratio of the number of molecules in the jar A and B will be :

1.  1 : 1

2.  1 : 2

3.  2 : 1

4.  4 : 1

Concept Questions :-

Ideal gas
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A balloon contains  of helium at 27°C and 1 atmosphere pressure. The volume of the helium at – 3°C temperature and 0.5 atmosphere pressure will be :

1.

2.

3.

4.

Concept Questions :-

Ideal gas
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A vessel contains 1 mole of ${\mathrm{O}}_{2}$ gas (molar mass 32) at a temperature T. The pressure of the gas is P. An identical vessel containing one mole of He gas (molar mass 4) at temperature 2T has a pressure of

1. P/8

2. P

3. 2P

4. 8P

Concept Questions :-

Ideal gas
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Difficulty Level:

A given mass of a gas is allowed to expand freely until its volume becomes double. If ${\mathrm{C}}_{\mathrm{b}}$ and ${\mathrm{C}}_{\mathrm{a}}$ are the velocities of sound in this gas before and after expansion respectively, then ${\mathrm{C}}_{\mathrm{a}}$ is equal to :

1. $2{\mathrm{C}}_{\mathrm{b}}$

2. $\sqrt{2}{\mathrm{C}}_{\mathrm{b}}$

3. ${\mathrm{C}}_{\mathrm{b}}$

4. $\frac{1}{\sqrt{2}}{\mathrm{C}}_{\mathrm{b}}$

Concept Questions :-

Ideal gas
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Difficulty Level:

One litre of Helium gas at a pressure 76 cm of Hg and temperature 27° is heated till its pressure and volume are doubled. The final temperature attained by the gas is :

1.  927°C

2.  900°C

3.  627°C

4.  327°C

Concept Questions :-

Ideal gas
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Difficulty Level:

The molecular weight of a gas is 44. The volume occupied by 2.2 g of this gas at $0°\mathrm{C}$ and 2 atm. Pressure will be

1.  0.56 litre

2.  1.2 litres

3.  2.4 litres

4.  5.6 litres

Concept Questions :-

Ideal gas
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Difficulty Level:

A gas at 27°C temperature and 30 atmospheric pressure is allowed to expand to the atmospheric pressure. If the volume becomes 10 times its initial volume, then the final temperature becomes

1.  100°C

2.  173°C

3.  273°C

4.  – 173°C

Concept Questions :-

Ideal gas
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Difficulty Level:

In the relation

1.  Number of molecules

2.  Atomic number

3.  Mass number

4.  Number of moles

Concept Questions :-

Ideal gas
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The equation of state corresponding to 8 g of ${\mathrm{O}}_{2}$ is :

1.  PV = 8RT

2.  PV = RT/4

3.  PV = RT

4.  PV = RT/2

Concept Questions :-

Ideal gas