Q .     Salts of A (atomic weight 7), B (atomic
weight 27) and C (atomic weight 48) were
electrolysed under identical conditions
using the same quantity of electricity. It
was found that when 2.1 g of A was
deposisted, the weight of B and C
deposited were 2.7 g and 9.6 g. The
valencies of A, B and C are respectively :

BITSAT Mock
A

2, 3 and 2

B

3, 1 and 3

C

3, 1 and 2

D

1, 3 and 2

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