Question

# A direct current deposits $$54\ g$$ of silver (Atomic mass $$= 108$$) during electrolysis. How much aluminium (Atomic mass $$= 27$$) would be deposited from aluminium chloride solution by the same amount of electricity?

A
4.5 g
B
5.4 g
C
54 g
D
27 g

Solution

## The correct option is A $$4.5\ g$$Equivalent mass of silver $$= 108$$Equivalent mass of aluminium in $$(AlCl_{3}) = \dfrac {27}{3} = 9$$$$\dfrac {W_{Ag}}{W_{Al}} = \dfrac {E_{Ag}}{E_{Al}}$$$$\dfrac {54}{W_{Al}} = \dfrac {108}{9}$$$$W_{Al} = 4.5\ g$$.Hence, the correct option is $$\text{A}$$Chemistry

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