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Q.

4.5g of Aluminium (at mass 27amu) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be.

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a

5.6 L

b

11.2L

c

22.4 L

d

44.8 L

answer is C.

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Detailed Solution

Eq. of Al= eq. of H2

4.5273= eq. of H2;4.59= eq. of H22H++2e−→H2

eq. of H2= Number of moles x n factor

0.5 =nH2×2

VH2=0.52×22.4; VH2=5.6 

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