Element A (atomic mass = 112) and element B (atomic mass = 27) form chlorides. Solutions of these chlorides are electrolysed separately and it is found that when the same quantity of electricity is pa

Question

Element A (atomic mass = 112) and element B (atomic mass = 27) form chlorides. Solutions of these chlorides are electrolysed separately and it is found that when the same quantity of electricity is passed, 5.6 g of A was deposited while only 0.9 g of B was deposited. The valency of B is 3. The valency of A is

Prashant Kotian · Accepted Answer

Correct answer: B. Equivalent weight of B = . Equivalents of B deposited = eq. By Faraday's second law, equivalents of A deposited = 0.1 eq. Equivalent weight of A = . Valency of A = Atomic mass / Equivalent weight = . Therefore, correct answer is B.

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