A solution of a salt of a metal was electrolysed for ` 150 ` minutes with a current of ` 0 . 15` amperes. The weight fo metal deposted was `0. 783 g`. The equivalent weight to the metal is .

Options

A. ` 55.97 g`
B. ` 65 . 97 g`
C. ` 75 . 97 g`
D. ` 85 . 97 g`

Answer

A

Explanation

Time `(t) = 150 min = 900 sec`
Current ` (I) =0.15 A`
Weight of metal ` (w) =0.783 g`
we know `Q = I xx t = 0. 15 xx 9000 = 1350 C.1350 C` of electricty will deposit ` 0.783 g` of metal , so ` 96500 C` of electrictiy will deposit `(0.783 xx 96500)/(1350) = 55. 97 g`.