Explore topic-wise MCQs in Chemistry.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

At STP conditions how much volume does one mole of a gas comprise of _________

A. 22.4 liters
B. 24 liters
C. depends on the molecular weight of the gas
D. depends on some other conditions
Answer» B. 24 liters
Discussion
2.

How many moles of oxygen are present in 64 grams of oxygen?

A. three moles
B. two moles
C. one mole
D. 16 moles
Answer» C. one mole
Discussion
3.

What can you say about particles motion in gases?

A. only vibratory
B. very slow
C. both vibratory and irregular
D. too Rapid and random
Answer» E.
Discussion
4.

What is the percentage of Nitrogen in the atmosphere approximately?

A. 78.09
B. 21
C. 20
D. 32
Answer» B. 21
Discussion
5.

Which of the following is not a gas law?

A. Boyle’s law
B. Charles law
C. Hooks law
D. Gay lussac’s law
Answer» D. Gay lussac’s law
Discussion
6.

Gases mix properly without any mechanical aid.

A. true
B. false
Answer» B. false
Discussion
7.

Gases have low density than that of solids and liquids because of __________

A. no thermal energy
B. higher intermolecular energy
C. both intermolecular energy and thermal energy are the same
D. higher thermal energy
Answer» E.
Discussion
8.

Which of the following element is not a gas?

A. Hydrogen
B. Oxygen
C. Mercury
D. Nitrogen
Answer» D. Nitrogen
Discussion
9.

Which of the following statement is true regarding gases?

A. gases are highly incompressible
B. gases exert equal pressure on each and every direction
C. its volume and shape is fixed
D. gases have the highest density among the 3 States of matter
Answer» C. its volume and shape is fixed
Discussion
10.

What is the lowermost layer of the earth?

A. stratosphere
B. troposphere
C. ionosphere
D. mesosphere
Answer» C. ionosphere
Discussion