Question

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

• A. $6\times {10}^{23}$
• B. $6\times {10}^{20}$
• C. $3.75\times {10}^{20}$
• D. $7.48\times {10}^{23}$

Answer 1

The correct option is C $3.75\times {10}^{20}$

You need a basic idea from physics that charge = $I\times t$.
Total charge = 60 C.
Number of electrons = $60/(1.6\times {10}^{-19})$