Salts of A (atomic mass 15), B (atomic mass 27) and C (atomic mass 48) were electrolysed using same amount of charge. It was found that when 4.5 g of A was deposited, the masses of B and C deposited were 2.7 g and 9.6 g. The valencies of A, B and C were respectively

Step-by-step solution

According to Faraday's second law Mass   of   A Equivalent   mass   of   A = Mass   of   B  Equivalent   mass   of   B = Mass   of   C Equivalent   mass   of   C 4.5 15 / n 1 = 2.7 27 / n 2 = 9.6 48 / n 3 n 1 : n 2 : n 3 0.3 : 0.1 : 0.2 3 : 1 : 2 .