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InterviewSolution
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Element A (atomic mass 112) and element B (atomic mass 27) form chlorides . Solutoins of these chlorides are electrolysed separately and it is found that the same quantity of electricity is passed 5.6 gm of A deposited while only 0.9 gm of B was deposited . if the valency of B is 3 , the valency of A isA. 2B. 3C. 4D. `-2` |
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Answer» Correct Answer - A Equivalent mass of A = `("Atomic mass")/("valency") = (112)/(x)` Equivalent mass of B = `("Atomic mass")/("valency") = (27)/(3) = 9` `("Mass of A")/("Mass of B") = ("Equivalent mass of A")/("Equivalent mass of B") = (5.6)/(0.9)` `therefore (112//x)/(9) = (5.6)/(0.9)` `therefore x = (112 xx 0.9)/(9 xx 5.6) = 2` Valency of A = 2 |
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