Applied Thermodynamics (3161910) MCQs

MCQs of Properties of Gases and Gas Mixtures

Showing 11 to 10 out of 20 Questions
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11.

Compressibility factor z is

(a)

Z=pvRT
(b)

Z=pvMT
(c)

Z=pvnT
(d)

Z=pVRT
Answer:

Option (a)

12.

For a gas, the compressibility factor Z depends on

(a)

pressure and volume
(b)

pressure and temperature
(c)

volume and temperature
(d)

pressure, volume and temperature
Answer:

Option (b)

13.

At very low pressures Z approaches

(a)

zero
(b)

unity
(c)

0.5
(d)

infinity
Answer:

Option (a)

14.

Critical point occurs at

(a)

highest temperature and pressure at which gas and liquid can coexist
(b)

lowest temperature and pressure at which gas and liquid can coexist
(c)

highest temperature and lowest pressure at which gas and liquid can coexist
(d)

lowest temperature and highest pressure at which gas and liquid can coexist
Answer:

Option (a)

15.

The set of physical conditions at which the density and other properties of a liquid and vapour become identical is called

(a)

corresponding state
(b)

critical state
(c)

equation of state
(d)

none of the mentioned
Answer:

Option (b)

16.

Any compound should have the same reduced volume at the same reduced pressure and reduced temperature is known as

(a)

law of corresponding states
(b)

law of critical state
(c)

law of reduced state
(d)

none of the mentioned
Answer:

Option (a)

17.

The law of corresponding states is a relation among

(a)

reduced pressure and reduced temperature
(b)

reduced volume and reduced temperature
(c)

reduced volume and reduced pressure
(d)

reduced pressure and reduced temperature and reduced volume
Answer:

Option (d)

18.

The ratios of pressure, temperature and specific volume of a real gas to the corresponding critical values are called

(a)

reduced properties
(b)

corresponding variables
(c)

standard condition variables
(d)

none of the mentioned
Answer:

Option (a)

19.

What is the reduced property of a substance?

(a)

A critical property of a substance minus existing property of the same substance
(b)

An existing property of a substance minus critical property of the same substance
(c)

The ratio of critical property to an existing property of the same substance
(d)

The ratio of existing property to a critical property of the same substance
Answer:

Option (d)

20.

The generalized compressibility chart is a plot in

(a)

when reduced pressure is plotted as a function of reduced temperature and Z
(b)

when the temperature is plotted as a function of reduced pressure and Z
(c)

when Z is plotted as a function of reduced pressure and reduced temperature
(d)

none of the mentioned
Answer:

Option (b)

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