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MHT CET Chemistry question

ChemistryElectrochemistryMHT CET

Salts of (At. Mass 7), (At. Mass 27) and z (At. Mass 64) were electrolysed under identical conditions using the same quantity of electricity. It was found that when 2.1 g of was deposited, the masses of and z were 2.7 g and 9.6 g respectively. The valencies of , and are respectively

Answer: (B)

Solution

Masses are in the ratio of equivalent masses, ; taking gives , so the scale factor is

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Question ID VK-066667