In the reaction:
`2Al_((s))+6HCl_((aq.))rarr2Al_((aq.))^(3+)+6Cl_((aq.))^(-)+3H_(2(g))`

Options

A. `6L HCl_((aq))` is consumed for every `3L H_(2(g))` produced
B. `33.6L H_(2(g))` is produced regardless of temperature and pressure for avery mole Al that reacts
C. `67.2L H_(2(g))` at STP is produced for every mole Al that reacts
D. `11.2 H_(2(g))` at STP is produced for every mole `HCl_((aq))` consumed

Answer

D

Explanation

`2Al(s)+6 HCl(aq) rarr 2 Al^(3-) (aq)+6Cl^(-) (aq)+3 H_(2)(g)`
For each mole of HCl reacted, 0.5 mole of `H_(2)` gas is formed at STP.
1 mole of an ideal gas occupies 22.4 lit at STP.
Volume of `H_(2)` has formed at STP per mole of HCl reacted is `22.4xx0.5` litre.