Question

Assertion (A): Transition metals have high enthalpy of atomisation.

Reason (R): Greater number of unpaired electrons in transition metals results in weak metallic bonding.

विकल्प

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

• Both (A) and (R) are true, but (R) is not the correct explanation of (A).

• (A) is true, but (R) is false.

• (A) is false, but (R) is true.

Answer 1

(A) is true, but (R) is false.

Explanation:

The assertion (A) is true: Transition metals exhibit a high enthalpy of atomization. This is owing to the strong metallic bonds found in these metals.

The reasoning (R) is false: The existence of unpaired electrons in transition metals causes stronger, rather than weaker, metallic bonding. The delocalization of d and s electrons across the metal lattice helps to form strong metallic connections.