Explore topic-wise MCQs in Chemistry.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Why is ozone a powerful bleaching agent?

A. It is highly electronegative
B. Nascent oxygen
C. Instability of molecule
D. Large negative Gibbs energy
Answer» C. Instability of molecule
Discussion
2.

As ozone transitions from solid to liquid to gas, what is the notable color change?

A. Pale blue to violet to deep blue
B. Violet to pale blue to deep blue
C. Deep blue to violet to pale blue
D. Violet to deep blue to pale blue
Answer» E.
Discussion
3.

Which of the following methods is used to form ozone from oxygen?

A. Standard electric discharge
B. Silent electric discharge
C. Thermal decomposition
D. Heating in an atmosphere of excess oxygen
Answer» C. Thermal decomposition
Discussion
4.

“Ozone is a pollutant.” True or false?

A. True
B. False
Answer» B. False
Discussion
5.

What is the chemical formula structure of ozone?

A. O = O+ – O–
B. O– – O = O+
C. O = O– – O+
D. O– = O+ – O
Answer» B. O– – O = O+
Discussion