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Question

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:


Your Answer
A
44.8 L
Your Answer
B
22.4 L
Your Answer
C
11.2 L
Correct Answer
D
5.6 L

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

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