`4.5 g` of aluminium (at mass `27 u`) is deposited at cathode from `Al^(3+)` solution by a certain quantity of electric charge. The volume of hydrogen gas produced at `STP` from `H^(+)` ions in solution by the same quantity of electric charge will be:

Options

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

Answer

D

Explanation

(d) From second law of Faraday
`(m_(Al))/(m_(H))=(E_(Al))/(E_(H))`
`(4.5)/(m_(H))=(27//3)/(1)`
` or m_(H)=0.5 g`
`:' ` Volume of 2g `H_(@)` at STP=22.4L
`:.` Volumw od 0.5 g `H_(2)` at STP `=(22.4xx0.5)/(2)L=5.6L`