Assertion (A): d-block elements are weak reducing agents than s-block elements.
Reason (R): The reducing capacity of d-block is less due to high heats of vaporisation, high ionisation enthalpies and heats of hydration of their ions.

Question

Assertion (A): d-block elements are weak reducing agents than s-block elements.

Reason (R): The reducing capacity of d-block is less due to high heats of vaporisation, high ionisation enthalpies and heats of hydration of their ions.

TestHub · Accepted Answer

Assertion (A): True — d-block elements are generally weaker reducing agents than s-block elements because they lose electrons less easily.
Reason (R): True — d-block elements have high ionisation enthalpy and high heats of vaporisation, so they do not readily form ions.

These factors directly explain why their reducing power is lower than s-block elements.

Hence, both A and R are true, and R correctly explains A.

Chemistry - Complete d-block Question with Solution | TestHub

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