Explore topic-wise MCQs in Chemistry.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

5 moles of liquid X and 10 moles of liquid Y make a solution having a total vapour pressure 70 torr. The vapour pressures of pure X and pure Y are 64 torr and 76 torr respectively. Which of the following is true regarding the described solution?

A. The solution shows positive deviation
B. The solution shows negative deviation
C. The solution is ideal
D. The solution has volume greater than the sum of individual volumes
Answer» C. The solution is ideal
Discussion
2.

If liquids A and B form an ideal solution, then what is the Gibbs free energy of mixing?

A. > 0
B. < 0
C. = 0
D. Not Defined
Answer» C. = 0
Discussion
3.

Which of the following is true regarding azeotropes?

A. An azeotrope does not exhibit the same concentration in the vapour phase and the liquid phase
B. Azeotropic mixtures cannot be separated into their constituents by fractional distillation
C. In case of minimum boiling azeotropes, the boiling point of the azeotrope is higher than the boiling point of either of the pure components
D. In case of maximum boiling azeotropes, the boiling point of the azeotrope is lesser than the boiling point of either of the pure components
Answer» C. In case of minimum boiling azeotropes, the boiling point of the azeotrope is higher than the boiling point of either of the pure components
Discussion
4.

Which of the following cannot form an azeotrope?

A. H<sub>2</sub>O + C<sub>2</sub>H<sub>5</sub>OH
B. CHCl<sub>3</sub> + C<sub>2</sub>H<sub>5</sub>OH
C. HCl + H<sub>2</sub>O
D. Benzene + Toluene
Answer» E.
Discussion
5.

Which of the following is true regarding non-ideal solutions with negative deviation?

A. The interactions between the components are lesser than in the pure components
B. V<sub>mixing</sub> = +ve
C. H<sub>mixing</sub> = +ve
D. They form maximum boiling azeotropes
Answer» E.
Discussion
6.

Which of the following is not an example of a non-ideal solution showing negative deviation?

A. HNO<sub>3</sub> + Water
B. HCl + Water
C. Acetic acid + Pyridine
D. Carbon tetrachloride + Toluene
Answer» E.
Discussion
7.

Ideal solutions do not form azeotropes.

A. True
B. False
Answer» B. False
Discussion
8.

Which of the following is an example of a non-ideal solution showing positive deviation?

A. Acetone + Carbon disulphide
B. Chlorobenzene + Bromobenzene
C. Chloroform + Benzene
D. Acetone + Aniline
Answer» B. Chlorobenzene + Bromobenzene
Discussion
9.

Which of the following is false regarding Non-Ideal solutions?

A. They do not obey Raoult s law
B. V<sub>mixing</sub> 0
C. H<sub>mixing</sub> = 0
D. They form azeotropes
Answer» D. They form azeotropes
Discussion
10.

A solution which does not obey Raoult s law is called a non-ideal solution.

A. True
B. False
Answer» B. False
Discussion
11.

Which of the following is not an example of an Ideal solution?

A. Benzene + Toluene
B. n-Hexane + n-Heptane
C. Ethyl alcohol + Water
D. Ethyl bromide + Ethyl chloride
Answer» D. Ethyl bromide + Ethyl chloride
Discussion
12.

Which of the following statements regarding Ideal solutions is false?

A. Ideal solutions obey Raoult s law under all conditions of temperature and concentrations
B. There will be some change in volume on mixing the components, i.e., V<sub>mixing</sub> 0
C. There will be no change in enthalpy when the two components are mixed, i.e., H<sub>mixing</sub> = 0
D. There will be no change in volume on mixing the components, i.e., V<sub>mixing</sub> = 0
Answer» C. There will be no change in enthalpy when the two components are mixed, i.e., H<sub>mixing</sub> = 0
Discussion