Current Electricity - Result Question 59
63. If nearly $10^{5}$ coulombs liberate 1 gm-equivalent of aluminium, then the amount of aluminium (equivalent weight 9), deposited through electrolysis in 20 minutes by a current of $50 amp$. will be
[1998]
(a) $0.6 gm$
(b) $0.09 gm$
(c) $5.4 gm$
(d) $10.8 gm$
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Answer:
Correct Answer: 63. (c)
Solution:
- (c) $m=Z i t, 9=Z \times 10^{5}, Z=9 \times 10^{-5}$
Again,
$m=Z i t=9 \times 10^{-5} \times 50 \times 20 \times 60=5.4 gm$
