Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Condensation”.
1. ________ is the change of vapour in a non-condensable gas.
a) Saturation
b) Vaporization
c) Condensation
d) None of the mentioned
Answer: c
Clarification: Condensation is the change of vapour in a non-condensable gas.
2. In a condensation process, _______ to _________
a) Gas, Solid
b) Gas, Liquid
c) Liquid, Gas
d) Liquid, Solid
Answer: b
Clarification: In a condensation process, Gas to Liquid.
3. When vapour is cooled at constant total system volume, the _______ changes.
a) Volume
b) Pressure
c) Temperature
d) None of the mentioned
Answer: b
Clarification: When vapour is cooled at constant total system volume, the pressure changes.
4. When vapour is compressed isothermally the ____________ changes.
a) Volume
b) Pressure
c) Temperature
d) None of the mentioned
Answer: a
Clarification: When vapour is compressed isothermally the volume changes.
5. Condensation starts ________ point.
a) Dew point
b) Bubble point
c) Triple point
d) None of the mentioned
Answer: a
Clarification: Condensation starts Dew point.
6. When gas changes to liquid through the process of condensation, the temperature
a) Increases
b) Decreases
c) Remains constant
d) None of the mentioned
Answer: c
Clarification: Temperature is constant during condensation.
7. When the vapour is condensed at constant system pressure, the pressure changes.
a) Correct statement
b) Incorrect statement
c) Can`t say anything
d) None of the mentioned
Answer: a
Clarification: When the vapour is condensed at constant system pressure, the pressure changes.
8. If the fraction of water vapour at 127 Degree Celsius and 1 atm is 0.5, what is the fraction of water vapour at 27 Degree C and 1 atm?
a) 0.275
b) 0.375
c) 0.475
d) 0.875
Answer: b
Clarification: Fraction = 0.5*300/400 = 0.375.
9. Leonard set up the experiment shown below.
9. Correct statement is/are
A: Steam is formed when water boils.
B: water vapour loses heat during condensation.
a) Both A and B
b) Neither A nor B
c) Only A
d) Only B
Answer: a
Clarification: Boiling of water forms steam and due to heat loss condensation is occurring.
10. Water changes into water vapour only when boiling occurs. The statement is
a) Correct
b) Incorrect
c) Always correct
d) None of the mentioned
Answer: b
Clarification: In other operation as well water result in vapour.