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How long will it take for a current of 3...

How long will it take for a current of 3 amperes to decompose 36g of water? (Eq. wt. of hydrogen is 1 and that of oxygen is 8)

A

`36` hrs .

B

18 hrs

C

9 hrs

D

4.5 hrs

Text Solution

Verified by Experts

The correct Answer is:
A
Eq. mass of `H_(2)O = 1 + 8 = 9` . Hence 9 g is decomposed by 96500 C . So 36 g will be decomposed by Q = `96500 xx 4 C` .
Hence , `t = (Q)/(T) = (96500 xx 4 )/(3) s = (96500 xx 4)/(3 xx3600)` hr = 35.74 hr
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