Q.

On passing 3F electricity through three cells containing fused Na2CO3, fused Cu(NO3)2 and fused Al(NO3)3, the number of moles of the metals deposited are in the ratio

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1:2:3

3:2:1

6:3:2

3:4:2

answer is C.

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Detailed Solution

Number of moles deposited =number of equivalents depositedvalency(n)Ratio of moles of each metal deposited =31:32:33=3:32:1=6:3:2

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