Salts of `A` (atomic weight `7`), `B` (atomic weight `27`) and `C` (atomic weight `48`) were electolysed under idential condition using the same quanity of electricity. It was found that when `2.1 g` of `A` was deposited, the weights of `B` and `C` deposited were `2.7` and `7.2 g`. The valencies `A, B` and `C`respectively:A. `3, 1` and `2`B. `1, 3` and `2`C. `3, 1` and `3`D. `2, 3` and `2`

Salts of `A` (atomic weight `7`), `B` (atomic weight `27`) and `C` (at

1.	Salts of `A` (atomic weight `7`), `B` (atomic weight `27`) and `C` (atomic weight `48`) were electolysed under idential condition using the same quanity of electricity. It was found that when `2.1 g` of `A` was deposited, the weights of `B` and `C` deposited were `2.7` and `7.2 g`. The valencies `A, B` and `C`respectively:A. `3, 1` and `2`B. `1, 3` and `2`C. `3, 1` and `3`D. `2, 3` and `2`
Answer» Correct Answer - B Eq. of `A =` Eq. of `B =` Eq. of `C` `(2.1)/(7//n_(1)) = (2.7)/(27//N_(2)) = (7.2)/(48//n_(3))` `0.3n_(1) = 0.1n_(2) = 0.15n_(3)` `:. N_(1) = (n_(2))/(3) = (n_(3))/(2) = (n_(1), n_(2), n_(3))` are intergers.

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