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(B) According to Faraday's second law of electrolysis,the mass of substances deposited is proportional to their equivalent weights when the same quant

Vedclass · Accepted Answer

$0.17$

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(B) According to Faraday's second law of electrolysis,the mass of substances deposited is proportional to their equivalent weights when the same quantity of electricity is passed through different electrolytes.$\frac{W_{Ni}}{W_{Cr}} = \frac{E_{Ni}}{E_{Cr}}$Here,$W_{Ni} = 0.3 \ g$,$Atomic \ mass \ of \ Ni = 59$,$Valency \ of \ Ni = 2$,$Atomic \ mass \ of \ Cr = 52$,$Valency \ of \ Cr = 3$.Equivalent weight of $Ni$ $(E_{Ni})$ = $\frac{59}{2} = 29.5$.Equivalent weight of $Cr$ $(E_{Cr})$ = $\frac{52}{3} = 17.33$.Substituting the values: $\frac{0.3}{W_{Cr}} = \frac{29.5}{17.33}$.$W_{Cr} = \frac{0.3 	imes 17.33}{29.5} \approx 0.176 \ g$.Rounding to the nearest option,the answer is $0.17 \ g$.

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