Question

A certain metal salt solution is electrolysed in series with a silver coulometer. The weight of silver and the metal deposited are `0.5094g` and `0.2653g`. Calculate the valency of the metal if its atomic weight is nearly that of silver.
A. 1
B. 2
C. 3
D. 4

Answer 1

Correct Answer - B
`(w_(1))/(w_(2))=((E_(1))_(Ag))/((E_(2))_("metal"))` , `(0.5094)/(0.2653) = (((at.)/(v.f.))_(Ag))/(((at.)/(v.f.))_("metal"))`
`(0.5094)/(0.2653)=((v.f)_(Ag))/(1)` , `v.f. = 1.0~~2`