1.

`0.2864 g` of `Cu` was deposited on passage of a current of `0.5` ampere for `30` minutes through a copper sulphate solution. The electrochemical equivalent of copper isA. `0.32 g`B. `0.00032 g`C. `0.032 g`D. `0.0032 g`

Answer» Correct Answer - B
In electrolysis, the mass of a substacne deposited or libereated when `1` ampere of current is passed through an electrolyte for `1` second (`1` coulomb of electricity) is known as its electrochemical equivalent `(Z)`. Therefore
`Z = ("Mass of Cu deposited")/("No. of Coulombs")`
`= (0.2864 g)/((0.5 A)(30 xx 60 s))`
`= 0.00032 g//C`


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