Question

4.5 g of aluminium (at mass 27 amu) is deposited at cathode from `Al^(3+)` 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
A. 22.4L
B. 44.8L
C. 5.6L
D. 11.2L

Answer 1

Correct Answer - C
Eq. of Al=eq. of `H_(2)`
`(4.5)/((27)/(3))="eq. of "H_(2),(4.5)/(9)=eq." of "H_(2)`
`2H^(+)+2e^(-)toH_(2)`
eq. of `H_(2)="number of moles"xx"n factor ".5=n_(H_(2))xx2`
`V_(H_(2))=(0.5)/(2)xx22.4,V_(H_(2))=5.6` l.