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Q.

 Assertion : Fused CaH2 consists of Ca+2ions and H ions 

Reason : Elecrtrolysis of fused CaH2 liberates H2 gas at cathode

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a

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

b

 (A) is true but (R) is false 
 

c

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

d

 Both (A) and (R) are fals

answer is C.

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Detailed Solution

CaH2Ca+2+2H-

Cathode reaction : Ca+2 + 2e- Ca(s)

Anode reaction : 2H H2

Hydrogen is liberated at anode 

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