Molecules in Class 9 Science : Practice MCQ Questions & Answers with Explanations

2 practice sets · Page 1 of 1

Which of the following is a diatomic molecule?

Oxygen (O₂)

Nitrogen (N₂)

Chlorine (Cl₂)

All of the mentioned

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Correct Answer: D — All of the mentioned

Explanation:

Oxygen, nitrogen, and chlorine all exist as diatomic molecules.

Which of the following is a molecule made up of two identical atoms?

Water (H₂O)

Oxygen (O₂)

Methane (CH₄)

Carbon dioxide (CO₂)

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Correct Answer: B — Oxygen (O₂)

Explanation:

Oxygen molecules consist of two oxygen atoms bonded together.