Chemical Process Calculation Questions and Answers – Ideal Gas – II

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This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Ideal gas – II”.

1. At constant temperature the pressure of an ideal gas is doubled its density becomes
a) Half
b) Double
c) Same
d) None

Explanation: Density is proportional to pressure.

2. For an ideal gas, incorrect statement is
a) Molecules do not occupy any space
b) No attractive force exist between the molecules
c) The gas molecules move in random, straight line motion
d) None of the mentioned

Explanation: Conditions for a gas to behave as predicated by the ideal gas law.

3. Correct statement is
a) Gases at low pressure or high temperature behave as an ideal gas
b) Gases at high pressure or low temperature behave as an ideal gas
c) Gases at high density behave as an ideal gas
d) None of the mentioned

Explanation: Gases at low pressure or high temperature behave as an ideal gas.
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4. What is the volume of 20 gms of Oxygen in Litre at standard conditions?
a) 10
b) 12
c) 14
d) 16

Explanation: At standard conditions, 1 mole of of gas occupy 22.4 litre volume.

5. What is the density of Carbon-di-oxide in kg/m3 at 27 degree celcius and 100 KPa?
a) 1.76
b) 2.76
c) 3.76
d) 4.76

Explanation: density = (Pressure*Molecular weight)/(Gas constant*Temperature).

6. Usually while measuring the specific gravity of a gas, the reference gas that is taken is air.
The above given statement is-
a) False
b) True
c) Depends on the gas
d) None of the mentioned

Explanation: Air is usually taken at the same temperature and pressure.

7. What is the volume of 2.5 gm moles Nitrogen gas at STP? At 100 KPa pressure and 300 K temperature, 2 gm moles of the gas occupy 20 cubic meter volume.
a) 11.23
b) 22.46
c) 33.69
d) 44.92

Explanation: P1V1/n1T1 = P2V2/n2T2.

8. Which one has the lowest density at room temperature?
a) Ne
b) N2
c) NH3
d) CO

Explanation: NH3 have minimum molecular weight.

9. 1 atm pressure and 0°C’ condition is known as
a) Room temperature and pressure
b) Standard temperature and pressure
c) Atmospheric temperature and pressure
d) None of the mentioned

Explanation: 1 atm pressure and 0°C condition is known as standard temperature and pressure (STP).

10. At standard conditions, what is the volume of 1 kg mole of ideal gas?
a) 22.4 m3
b) 2240 m3
c) 224000 m3
d) None of the mentioned

Explanation: V = nRT/P.

Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.

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