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Q.

Statement-1: The alkali metals can form ionic hydrides which contain the hydride ion H-. Statement-2: The alkali metals have low electronegativity; their hydrides conduct electricity when fused and liberate hydrogen at the anode.

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a

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

b

Statement-1 is False, Statement-2 is True

c

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

d

Statement-1 is True, Statement-2 is False.

answer is A.

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Detailed Solution

The hydride ion, H-, can be found in ionic hydrides formed by alkali metals such as NaH,KH,LiH, and CsH.
Alkali metals also exist as ions in a molten state and conduct electricity despite having low electronegativity.
At the anode of electrolysis, H- oxidises and releases hydrogen as

2H2eH2.

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