InterviewSolution
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InterviewSolution
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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. 1 , 2 and 3B. 1 , 3 and 2C. 3 , 1 and 2D. 2 , 3 and 1 |
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Answer» Correct Answer - B When small quantity of current is passed through solution of different salts , the amount of substanced deposited are in the ratio of their equivalent masses . Valency = `("At. Mass")/("Eq. mass") = ("At.mass")/("Mass of the substance")` `therefore` valency of A `:` valency of B `:` valency of C `= (7)/(2.1) : (27)/(2.7) : (64)/(9.6)` = `(1)/(0.3) : (1)/(0.1) : (2)/(0.3)` `= (1)/(0.3) : (3)/(0.1) : (2)/(0.3)` |
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