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

Options

A. 44.8 L
B. 11.2 L
C. 22.4 L
D. 5.6 L

Answer

D

Explanation

Applying, `w_(H-2)/w_(AI)=E_(H_2)/E_(AI)`
`implies` `w_(H_2)=1/9xx4.5` =0.5g
2 g of `H_2` =22.4 L aat STP
0.5 g of `H_2 =22.4/2xx0.5` =5.6 L