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Assertion (A): s- block elements can for...

Assertion (A): s- block elements can form ionic hydrides. Which on electrolysis in fused state give `H_(2)` gas at cathode.
Reason (R) : s-block elements have low IE and low EN as compared to p-block elements.

A

If both A and R are correct and R is the correct explanation for A.

B

If both A and R are correct and R is not the correct explanation for A.

C

If A is correct and R is incorrect

D

If A is incorrect and R is correct

Text Solution

Verified by Experts

The correct Answer is:
D
Correct assertion: s-block elements form ionic hydrides but gives `H_(2)` gas at anode, e.g.
`NaH rarr Na^(o+) + H^(ɵ)`
`2H^(ɵ) rarr H_(2)+2e^(-)` (oxidation occurs at anode)
Reason is correct.
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