Question

Assertion: The trans-[CoCl₂(en)₂]⁺ is optically inactive.

Reason: It is symmetrical because it contains a plane of symmetry.

Options

• If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

• If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.

• If Assertion is CORRECT but Reason is INCORRECT.

• If Assertion is INCORRECT but Reason is CORRECT.

Answer 1

If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.
Explanation:

The trans-[CoCl₂(en)₂]⁺ is optically inactive because it has a plane of symmetry.

The reason is correct. The trans-isomer of [CoCl₂(en)₂]⁺ is symmetrical and contains a plane of symmetry, making it optically inactive. In optical isomerism, the lack of symmetry (chiral center) is required, and a plane of symmetry in this case makes the complex achiral (optically inactive).