Explore topic-wise MCQs in Chemistry.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Acetic acid associates as dimers in benzene. What is the Van t Hoff factor (i) if the degree of association of acetic acid is 50%?

A. 0.25
B. 0.50
C. 0.75
D. 0.40
Answer» D. 0.40
Discussion
2.

The pH of a 2 M solution of a weak monobasic acid (HA) is 4. What is the value of the Van t Hoff factor?

A. 0.00005
B. 1.005
C. 1.0005
D. 1.00005
Answer» E.
Discussion
3.

Which of the following aqueous solutions should have the least boiling point?

A. 1.0 M KOH
B. 1.0 M (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>
C. 1.0 M K<sub>2</sub>CO<sub>3</sub>
D. 1.0 M K<sub>2</sub>SO<sub>4</sub>
Answer» B. 1.0 M (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>
Discussion
4.

What is the Van t Hoff Factor for 1 mole of BaCl2, assuming 100% dissociation?

A. 0.33
B. 1
C. 3
D. 2
Answer» D. 2
Discussion
5.

The depression of freezing point of a solution of acetic acid in benzene is 0.2 C. If the molality of acetic acid is 0.1 m, then find the ratio of the normal mass to the abnormal mass. (Assume Kf of acetic acid = 4.0 C m-1)

A. 1.5
B. 0.8
C. 0.5
D. 0.2
Answer» D. 0.2
Discussion
6.

The Van t Hoff Factor for a solution of glucose in water is equal to 1.

A. True
B. False
Answer» B. False
Discussion
7.

In which of the following solutions will the Van t Hoff Factor for the solute be lesser than 1?

A. Sodium chloride in water
B. Benzoic acid in benzene
C. Acetic acid in benzene
D. Phenol in benzene
Answer» B. Benzoic acid in benzene
Discussion
8.

What is the value of the Van t Hoff factor (i) for solutes that dissociate in water?

A. &gt; 1
B. &lt; 1
C. = 0
D. Not defined
Answer» B. &lt; 1
Discussion
9.

Only if the calculated molar mass is higher than the actual molar mass of the solute, the calculated molar mass is considered to be abnormal molar mass.

A. True
B. False
Answer» C.
Discussion