The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = ) [2016]

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Solution

Q.
The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = $1.60 \times 10^{- 19}$ $C$ ) [2016]

1 $6 \times 10^{23}$

2 $6 \times 10^{20}$

3 $3.75 \times 10^{20}$

4 $7.48 \times 10^{23}$

Ans.
(3)

$Q = I \times t$

$Q = 1 \times 60 = 60$ $C$

Now, $1.6 \times 10^{- 19} C \equiv 1$ $electron$

$∴$ $60 C \equiv \frac{60}{1.6 \times 10^{- 19}} = 3.75 \times 10^{20}$ $electrons$

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