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 x10-19 C)

  • Option 1)

    6 x1023

  • Option 2)

    6 x1020

  • Option 3)

    3.75 x1020

  • Option 4)

    7.48 x1023

 

Answers (1)

 

Faraday's first law of electrolysis -

The mass of any substance deposited or dissolved at any electrode during electrolysis is directly propotional to the quantity of electricity passed through the solution.

- wherein

W\alpha\ Q

W = Z I t

Z = mass of electrolyte get deposited

Z = electro chemical equivalent

 

 Q=It

Q=1X60C = 60C

Since 1e = 1.6X10-19c

\Rightarrow 60^{\circ}C=\frac{60}{1.6 \times 10^{-19}}= 3.75 \times 10^{20} electrons


Option 1)

6 x1023

This option is incorrect.

Option 2)

6 x1020

This option is incorrect.

Option 3)

3.75 x1020

This option is correct.

Option 4)

7.48 x1023

This option is incorrect.

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