For the universal gas constant, (cm3)(atm)/(K)(g mole) is an appropriate unit.The given statement is

is an appropriate unit.The given statement isa) Correctb) Incorrectc) Can`t sayd) None of the mentioned

Mercury and water (Immiscible) in a same container would represent two different phases.The statement is

in a same container would represent two different phases.The statement isa) Correctb) Incorrectc) Can`t sayd) None of the mentioned

In a real gas equation pv = zRT, depending on the values of pressure and temperature of the real gas, the value of z

Should always be greater than 1

May be less than 1, may be greater than 1 or equal to 1

Should always be greater than 1

As per Gay Lussac’s law, which one is the correct statement PT = Pressure at temperature T°C; P0 = Pressure at temperature 0°C;

\({P_T} = P_0\;\left( {\frac{1}{T} + 273} \right)\)

\({P_T} = {P_0}\left( {1 + \frac{T}{{273}}} \right)\)

\({P_T} = P_0\;\left( {\frac{1}{T} + 273} \right)\)

A gas having a negative Joule-Thompson effect (μ < 0), when throttled will

Either be cooler or warmer depending on the type of gas

A substance whose Joule-Thomson coefficient is negative, is throttled to lower pressure. During this process ______

the entropy of the substances will decrease

the entropy of the substance will remain constant

the temperature of the substance will decrease

the temperature of the substance will increase

480 + Mcqs in Ideal Gases I in Chemical Process Calculation Page 1 McqOptions

1.	For the universal gas constant, (cm3)(atm)/(K)(g mole) is an appropriate unit.The given statement is
A.	Correct
B.	Incorrect
C.	Can`t say
D.	None of the mentioned
E.	is an appropriate unit.The given statement isa) Correctb) Incorrectc) Can`t sayd) None of the mentioned
Answer» B. Incorrect

Discussion

2.	The inverse of molar volume is
A.	Molar density
B.	Mole fraction
C.	Molar specific volume
D.	None of the mentioned
Answer» B. Mole fraction

Discussion

3.	Mercury and water (Immiscible) in a same container would represent two different phases.The statement is
A.	Correct
B.	Incorrect
C.	Can`t say
D.	None of the mentioned
E.	in a same container would represent two different phases.The statement isa) Correctb) Incorrectc) Can`t sayd) None of the mentioned
Answer» B. Incorrect

Discussion

4.	A gas weighs 16 N/m3 at 288 K and at an adiabatic pressure of 25 N/cm2. Its gas constant is
A.	532 J/kg K
B.	544 J/kg K
C.	553 J/kg K
D.	523 J/kg K
Answer» B. 544 J/kg K

Discussion

5.	In a real gas equation pv = zRT, depending on the values of pressure and temperature of the real gas, the value of z
A.	Should always be less than 1
B.	May be less than 1, may be greater than 1 or equal to 1
C.	Should always be greater than 1
D.	Should always be equal to 1
Answer» C. Should always be greater than 1

Discussion

6.	An ideal gas at 227°C is heated at constant pressure till volume becomes three times. The temperature of the gas will then be:
A.	927°C
B.	1027°C
C.	1227°C
D.	681°C
Answer» D. 681°C

Discussion

7.	In the Van der Waal’s gas equation \(\left( {p + \frac{a}{{{v^2}}}} \right)\left( {v - b} \right) = RT\) the constant ‘a’ is introduced to compensate for
A.	Reduction in specific volume
B.	Inter-molecular forces
C.	Reduction in specific heat
D.	Force of adhesion
E.	All of the above
Answer» C. Reduction in specific heat

Discussion

8.	Consider the following statement:1) In an ideal gas, there are no intermolecular forces of attraction and repulsion.2) At very low pressure, all gases and vapours approach ideal gas behaviour.3) Enthalpy of an ideal gas depends only on temperature.Which of the above statements are correct?
A.	1, 2 and 3
B.	1 and 2 only
C.	1 and 3 only
D.	2 and 3 only
Answer» B. 1 and 2 only

Discussion

9.	Highest ratio of specific heat is possible for?
A.	Oxygen
B.	Helium
C.	Hydrogen
D.	Air
Answer» C. Hydrogen

Discussion

10.	Air is heated from 0°C to 100°C in a sealed metal container. Its density
A.	Increases slightly
B.	Decreases slightly
C.	Remains the same
D.	Change cannot be predicted
Answer» C. Remains the same

Discussion

11.	As per Gay Lussac’s law, which one is the correct statement PT = Pressure at temperature T°C; P0 = Pressure at temperature 0°C;
A.	\({P_T} = {P_0}\left( {1 + \frac{T}{{273}}} \right)\)
B.	\({P_T} = P_0\;\left( {\frac{1}{T} + 273} \right)\)
C.	PT = P0 (273 + T)
D.	PT = P0 (T + 1)
Answer» B. \({P_T} = P_0\;\left( {\frac{1}{T} + 273} \right)\)

Discussion

12.	A gas is so expanded in a cylinder that its temperature remains constant. The resulting variation of pressure vs, volume is
A.	A parabola
B.	A hyperbola
C.	A straight line through origin
D.	None of these
Answer» C. A straight line through origin

Discussion

13.	A gas having a negative Joule-Thompson effect (μ < 0), when throttled will
A.	Become cooler
B.	Become warmer
C.	Remain at the same temperature
D.	Either be cooler or warmer depending on the type of gas
Answer» C. Remain at the same temperature

Discussion

14.	Isothermal and adiabatic process are identical at
A.	Saturation temperature
B.	Critical temperature
C.	Absolute zero temperature
D.	Below 0°C temperature
Answer» D. Below 0°C temperature

Discussion

15.	A cylinder of 50-litre capacity contains oxygen at temperature of 27°C and at absolute pressure 10 MPa. What will be the density of oxygen? [Gas constant for oxygen is 0.26 kJ/kg-K]
A.	1.28 kg/m3
B.	12.8 kg/m3
C.	128.2 kg/m3
D.	1282 kg/m3
Answer» D. 1282 kg/m3

Discussion

16.	A portable compressor is taken from the place where the barometric pressure is 750 mm Hg and the average intake temperature is 27°C to a mountainous region where the barometric pressure is 560 mm Hg and temperature is 7°C. The reduction in mass output of the machine is:
A.	80%
B.	60%
C.	40%
D.	20%
Answer» E.

Discussion

17.	In a process the final pressure and volume of a fixed mass of an ideal gas are twice that of its initial pressure and volume. If the initial temperature of the gas is 27°C, its final temperature in °C would be:
A.	54
B.	108
C.	927
D.	1200
Answer» D. 1200

Discussion

18.	An isenthalpic process is a process during which __________ remains constant.
A.	temperature
B.	entropy
C.	enthalpy
D.	pressure
Answer» D. pressure

Discussion

19.	Air is drawn in a compressor at the rate of 0.8 kg/s at a pressure of 1 bar and temperature of 20 °C, and is delivered at a pressure of 10 bar and temperature of 90 °C. This air delivery is through an exit valve of area 2 × 10–3 m2. If R is 287 J/kg-K, the exit velocity of the air is
A.	41.7 m/s
B.	35.8 m/s
C.	29.7 m/s
D.	27.3 m/s
Answer» B. 35.8 m/s

Discussion

20.	A substance whose Joule-Thomson coefficient is negative, is throttled to lower pressure. During this process ______
A.	the entropy of the substances will decrease
B.	the entropy of the substance will remain constant
C.	the temperature of the substance will decrease
D.	the temperature of the substance will increase
Answer» E.

Discussion

21.	What is the unit of ‘b’ in Peng Robinson equation?
A.	Liter/mole
B.	Liter²/mole²
C.	Mole/Liter
D.	Mole²/Liter²
Answer» B. Liter²/mole²

Discussion

22.	1 mole of cyclohexane (z = 1.2) is filled in a container at 27°C and 4 atm, what is the volume of container?
A.	3.8 liter
B.	4.4 liter
C.	5.6 liter
D.	7.4 liter
Answer» E.

Discussion

23.	A container has H₂ at 27°C and molar volume 1 liter/mole, if a = 9.24 atm(liter/mole), b = 0.0907 liter/mole, what is the temperature of H₂? (Use vander waal equation)
A.	7.5 atm
B.	12.4 atm
C.	15.6 atm
D.	17.8 atm
Answer» E.

Discussion

24.	What is the volume of 21 g of propane (z = 1.9) at 1 atm and 27°C?
A.	23.4 liter
B.	37.5 liter
C.	42.1 liter
D.	59.6 liter
Answer» B. 37.5 liter

Discussion

25.	A process is carried out for the feed mixture of 80% air and 20% CO₂, the compressor recovered 50% of CO₂, what is the exit pressure of the compressor, if the partial pressure of CO₂ is 15 mm Hg?
A.	135 mm Hg
B.	145 mm Hg
C.	175 mm Hg
D.	200 mm Hg
Answer» B. 145 mm Hg

Discussion

26.	The vapor pressure of a compound in liquid phase is given by ln p* = 21 – 2800/T, and in solid phase it is given by ln p* = 28 – 3500/T, what is the sublimation temperature of the compound?
A.	100 K
B.	120 K
C.	150 K
D.	200 K
Answer» B. 120 K

Discussion

27.	Answer the following question for the given diagram.What is the value of P?
A.	14.4 mole/hr
B.	36.3 mole/hr
C.	48.1 mole/hr
D.	65.9 mole/hr
Answer» C. 48.1 mole/hr

Discussion

28.	90 g glucose is filled in a container at 10 atm, if the volume of container is 2 liter, what is the temperature of glucose (z = 1.5)?
A.	25.4°C
B.	51.7°C
C.	76.9°C
D.	103.5°C
Answer» C. 76.9°C

Discussion

29.	A process is carried out for the feed mixture of 90% air and 10% water vapor, the compressor recovered 90% of water, what is the exit pressure of the compressor, if the partial pressure of water vapor is 50 mm Hg?
A.	286.1 mm Hg
B.	396.4 mm Hg
C.	458.7 mm Hg
D.	529.5 mm Hg
Answer» D. 529.5 mm Hg

Discussion

30.	What is the value of P, if the value of A = 10 mole, B = 15 mole, C = 6 mole, D = 8 mole?
A.	2 mole
B.	5 mole
C.	6 mole
D.	8 mole
Answer» B. 5 mole

Discussion

31.	Pressure of a gas at 127°C is 10 mm Hg and the pressure at 527°C is 20 Pa, what is the value of B?
A.	225.1
B.	365.5
C.	499.2
D.	554.5
Answer» E.

Discussion

32.	If the fraction of water vapor at 27°C and 5 atm is 0.5, then what is the fraction of water vapor at 27°C and 1 atm?
A.	0.1
B.	0.2
C.	0.5
D.	0.8
Answer» B. 0.2

Discussion

33.	Answer the below question for the following diagram.What is the value of W?
A.	227.5 mole/hr
B.	479.1 mole/hr
C.	568.2 mole/hr
D.	721.4 mole/hr
Answer» C. 568.2 mole/hr

Discussion

34.	How many recycle streams are there in the following process?
A.	1
B.	2
C.	3
D.	4
Answer» C. 3

Discussion

35.	CH₄ is burnt with 100% excess O₂ at atmospheric pressure, if CH₄ conversion is 100%, what is the pressure at dew point?
A.	0.2 atm
B.	0.4 atm
C.	0.6 atm
D.	0.8 atm
Answer» C. 0.6 atm

Discussion

36.	What is the compressibility of neon (molar mass = 20) with density 20 g/liter at 27°C and 100 atm?
A.	2.1
B.	3.5
C.	4
D.	6.8
Answer» D. 6.8

Discussion

37.	Answer the following question for the given diagram, the reaction is A -> 2B.What is the value of W?
A.	10 mole/hr
B.	40 mole/hr
C.	50 mole/hr
D.	90 mole/hr
Answer» D. 90 mole/hr

Discussion

38.	Virial Equation is a ______
A.	Arithmetic Progression
B.	Geometric Progression
C.	Harmonic Progression
D.	None of the mentioned
Answer» C. Harmonic Progression

Discussion

39.	If the pressure of a gas at 27°C is 15 mm Hg, what will be its pressure at 127°C, use B = 5 X 10³, C = 0, T is in kelvin and P is in mm Hg?
A.	579 mm Hg
B.	775 mm Hg
C.	961 mm Hg
D.	999 mm Hg
Answer» D. 999 mm Hg

Discussion

40.	Answer the following question for the given diagram, the reaction is A -> 2B.What is the value of P?
A.	5 mole/hr
B.	10 mole/hr
C.	25 mole/hr
D.	40 mole/hr
Answer» C. 25 mole/hr

Discussion

41.	In the diagram below, what is the left most box?
A.	Mixer
B.	Separator
C.	Processor
D.	None of the mentioned
Answer» B. Separator

Discussion

42.	The pressure of a compound at 200 K is 10 mm Hg and at 400 K it is 50 mm Hg, what is the pressure at T = 250 K?
A.	18.1 mm Hg
B.	24.2 mm Hg
C.	36.3 mm Hg
D.	48.4 mm Hg
Answer» B. 24.2 mm Hg

Discussion

43.	Which of the following is true about compressibility of real gases?
A.	Z = 1
B.	Z < 1
C.	Z > 1
D.	Both Z < 1 and Z > 1
Answer» E.

Discussion

44.	Condensation starts at which point?
A.	Dew point
B.	Bubble point
C.	Triple point
D.	None of the mentioned
Answer» B. Bubble point

Discussion

45.	What is the pressure of a gas at T = 227°C, it is given that A = 5, B = 4 X 104 and C = 0 if T is in kelvin and p in mm Hg?
A.	0.024 mm Hg
B.	0.049 mm Hg
C.	0.075 mm Hg
D.	0.096 mm Hg
Answer» C. 0.075 mm Hg

Discussion

46.	What is the unit of λ in SRK equation?
A.	Liter/mole
B.	Mole/Liter
C.	Atm(liter/mole)
D.	It is dimensionless
Answer» E.

Discussion

47.	What is the compressibility factor of a liquid of molar mass 90 g and density 10 g/liter at 27°C and 2 atm?
A.	0.14
B.	0.39
C.	0.51
D.	0.73
Answer» E.

Discussion

48.	At what temperature, does SO₂ with compressibility 2 has pressure 5 atm and molar volume 10 mole/s?
A.	300.5 K
B.	304.5 K
C.	310 K
D.	312.5 K
Answer» C. 310 K

Discussion

49.	What is the vapor pressure of ammonia at 305 K, if it is given that the vapor pressure of ammonia at 315 K is 5 mm Hg and at 325 K it is 6 mm Hg?
A.	1 mm Hg
B.	2 mm Hg
C.	3 mm Hg
D.	4 mm Hg
Answer» E.

Discussion

50.	At triple point, vapor pressure of ice is given by ln p* = 18 – 2560/T, and vapor pressure of water is given by ln p* = 28 – 5120/T, what is the temperature at triple point?
A.	225 K
B.	256 K
C.	320 K
D.	400 K
Answer» C. 320 K

Discussion

Explore topic-wise MCQs in Chemical Process Calculation.

For the universal gas constant, (cm3)(atm)/(K)(g mole) is an appropriate unit.The given statement is

The inverse of molar volume is

Mercury and water (Immiscible) in a same container would represent two different phases.The statement is

A gas weighs 16 N/m3 at 288 K and at an adiabatic pressure of 25 N/cm2. Its gas constant is

In a real gas equation pv = zRT, depending on the values of pressure and temperature of the real gas, the value of z

An ideal gas at 227°C is heated at constant pressure till volume becomes three times. The temperature of the gas will then be:

In the Van der Waal’s gas equation \(\left( {p + \frac{a}{{{v^2}}}} \right)\left( {v - b} \right) = RT\) the constant ‘a’ is introduced to compensate for

Consider the following statement:1) In an ideal gas, there are no intermolecular forces of attraction and repulsion.2) At very low pressure, all gases and vapours approach ideal gas behaviour.3) Enthalpy of an ideal gas depends only on temperature.Which of the above statements are correct?

Highest ratio of specific heat is possible for?

Air is heated from 0°C to 100°C in a sealed metal container. Its density

As per Gay Lussac’s law, which one is the correct statement PT = Pressure at temperature T°C; P0 = Pressure at temperature 0°C;

A gas is so expanded in a cylinder that its temperature remains constant. The resulting variation of pressure vs, volume is

A gas having a negative Joule-Thompson effect (μ < 0), when throttled will

Isothermal and adiabatic process are identical at

A cylinder of 50-litre capacity contains oxygen at temperature of 27°C and at absolute pressure 10 MPa. What will be the density of oxygen? [Gas constant for oxygen is 0.26 kJ/kg-K]

A portable compressor is taken from the place where the barometric pressure is 750 mm Hg and the average intake temperature is 27°C to a mountainous region where the barometric pressure is 560 mm Hg and temperature is 7°C. The reduction in mass output of the machine is:

In a process the final pressure and volume of a fixed mass of an ideal gas are twice that of its initial pressure and volume. If the initial temperature of the gas is 27°C, its final temperature in °C would be:

An isenthalpic process is a process during which __________ remains constant.

Air is drawn in a compressor at the rate of 0.8 kg/s at a pressure of 1 bar and temperature of 20 °C, and is delivered at a pressure of 10 bar and temperature of 90 °C. This air delivery is through an exit valve of area 2 × 10–3 m2. If R is 287 J/kg-K, the exit velocity of the air is

A substance whose Joule-Thomson coefficient is negative, is throttled to lower pressure. During this process ______

What is the unit of ‘b’ in Peng Robinson equation?

1 mole of cyclohexane (z = 1.2) is filled in a container at 27°C and 4 atm, what is the volume of container?

A container has H₂ at 27°C and molar volume 1 liter/mole, if a = 9.24 atm(liter/mole), b = 0.0907 liter/mole, what is the temperature of H₂? (Use vander waal equation)

What is the volume of 21 g of propane (z = 1.9) at 1 atm and 27°C?

A process is carried out for the feed mixture of 80% air and 20% CO₂, the compressor recovered 50% of CO₂, what is the exit pressure of the compressor, if the partial pressure of CO₂ is 15 mm Hg?

The vapor pressure of a compound in liquid phase is given by ln p* = 21 – 2800/T, and in solid phase it is given by ln p* = 28 – 3500/T, what is the sublimation temperature of the compound?

Answer the following question for the given diagram.What is the value of P?

90 g glucose is filled in a container at 10 atm, if the volume of container is 2 liter, what is the temperature of glucose (z = 1.5)?

A process is carried out for the feed mixture of 90% air and 10% water vapor, the compressor recovered 90% of water, what is the exit pressure of the compressor, if the partial pressure of water vapor is 50 mm Hg?

What is the value of P, if the value of A = 10 mole, B = 15 mole, C = 6 mole, D = 8 mole?

Pressure of a gas at 127°C is 10 mm Hg and the pressure at 527°C is 20 Pa, what is the value of B?

If the fraction of water vapor at 27°C and 5 atm is 0.5, then what is the fraction of water vapor at 27°C and 1 atm?

Answer the below question for the following diagram.What is the value of W?

How many recycle streams are there in the following process?

CH₄ is burnt with 100% excess O₂ at atmospheric pressure, if CH₄ conversion is 100%, what is the pressure at dew point?

What is the compressibility of neon (molar mass = 20) with density 20 g/liter at 27°C and 100 atm?

Answer the following question for the given diagram, the reaction is A -> 2B.What is the value of W?

Virial Equation is a ______

If the pressure of a gas at 27°C is 15 mm Hg, what will be its pressure at 127°C, use B = 5 X 10³, C = 0, T is in kelvin and P is in mm Hg?

Answer the following question for the given diagram, the reaction is A -> 2B.What is the value of P?

In the diagram below, what is the left most box?

The pressure of a compound at 200 K is 10 mm Hg and at 400 K it is 50 mm Hg, what is the pressure at T = 250 K?

Which of the following is true about compressibility of real gases?

Condensation starts at which point?

What is the pressure of a gas at T = 227°C, it is given that A = 5, B = 4 X 104 and C = 0 if T is in kelvin and p in mm Hg?

What is the unit of λ in SRK equation?

What is the compressibility factor of a liquid of molar mass 90 g and density 10 g/liter at 27°C and 2 atm?

At what temperature, does SO₂ with compressibility 2 has pressure 5 atm and molar volume 10 mole/s?

What is the vapor pressure of ammonia at 305 K, if it is given that the vapor pressure of ammonia at 315 K is 5 mm Hg and at 325 K it is 6 mm Hg?

At triple point, vapor pressure of ice is given by ln p* = 18 – 2560/T, and vapor pressure of water is given by ln p* = 28 – 5120/T, what is the temperature at triple point?