Salts of 
(atomic weight 8 ), 
(atomic weight 18 ) and 
(atomic weight 50 ) were electrolysed under identical conditions using the same quantity of electricity. It was found that 
of 
was deposited, the weight of 
and 
deposited are 
and 
, respectively. The valences of 
and 
are, respectively,
Text Solution
Verified by ExpertsC
According to Faraday's law,
Here, 
weight of substance discharged at an electrode. 
Electricity Charge (Coulomb)
Let the valence of A, B and 
are 
and 
respectively.
For 
For 
For 
For ratio of 
and 
, we get
By solving equation, 
valence of 
and 
are 1,3 and 2 .
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