MCQ-21
Molar heat of vaporization of water
A. 40.6 KJ/mol
B. 40.06 KJ/mol
C. 406 KJ/mol
D. 0.46 KJ/mol
Answer: A
MCQ-22
The correct order of boiling point of group VA hydrides
A. NH3> PH3> ASH3> SbH3
B. SbH3> ASH3> PH3> NH3
C. SbH3> NH3 > PH3> ASH3
D. SbH3> NH3> ASH3> PH3
Answer: D
MCQ 23
Water freezes at 0°C. The density of liquid H2O is 9% then the density of ice.
A. Higher
B. Lesser
C. None
D. Constant
Answer: A
MCQ-24
Among the following hydrides, which one has the lowest boiling point
A. HF
B. HI
C. HCI
D. HBr
Answer: C
MCQ-25
Hydrogen bonding is not present in one of the following mixtures
A. Ethanol and water
B. Chloroform and acetone
C. Carboxylic acid and water
D. Hydrocarbon and water
Answer: D
