4.5 g of Aluminium (atomic mass 27 amu) is deposited at the cathode from a Al3+ solution by a certain amount of charge. The volume of hydrogen produced at STP from H+ ions in solution by the same amount charge will be:
A
44.8 L
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B
22.4 L
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C
11.2 L
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D
5.6 L
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Solution
The correct option is D 5.6 L The number of equivalents of Al deposited =4.59=0.5 The volume of H2 gas at STP = number of equivalents × equivalent volume =0.5×11.2=5.6L