Question

Assertion (A): In a polyatomic molecule, atoms can vibrate about their mean positions.

Reason (R): A polyatomic molecule has the vibrational energy in addition to rotational and translational energies.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion.

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correction explanation of Assertion.

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion.

Explanation:

The assertion is true because atoms in a polyatomic molecule can vibrate around their mean positions. The reason is also true because these molecules possess vibrational energy along with rotational and translational energies. However, listing the types of energy a molecule has simply describes its motion; it does not explain the physical cause of why the atoms vibrate.