Question

A steady current of $1.5amp$ flows through a copper voltmeter for $10$ minutes. If the electro chemical equivalent of copper is $30\times {10}^{-5}gmcoulom{b}^{-1}$, the mass of copper deposited on the electrode will be then:

• A. 0.27 gm
• B. 0.40 gm
• C. 0.50 gm
• D. 0.67 gm

Answer 1

The correct option is A 0.27 gm

mass of copper deposite=m=Z I t (z=equivalent mass I=current ,t = time in

seconds)

m=(30x10^-5)x1.5x60x10

=27000x10^-5

=0.27 gm