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4.5 g of aluminium (at mass 27 u) is dep...

`4.5 g` of aluminium (at mass `27 u`) is deposited at cathode from `Al^(3+)` solution by a certain quantity of electric charge. The volume of hydrogen gas produced at `STP` from `H^(+)` ions in solution by the same quantity of electric charge will be:

A

44.8 L

B

22.4 L

C

11.2 L

D

5.6 L

Text Solution

Verified by Experts

The correct Answer is:
D
(d) Equivalent mass of `Al =27//3=9`
No. of equiv. of Al `=("Mass of Al deposited")/("Equivalent mass")`
`=((4.5 g))/((9g" equiv"))=0.5" equiv"`
No. of `"equiv"`. of `H_(2)` evolved`=0.5 "equiv"`.
Volume of `H_(2)` evolved`=((0.5" equiv"))/((1.0" equiv"))xx11.2L`
=5.6 L at S.T.P.
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