Question

1. 10 mol of Zn react with 10 mol of HCl. Calculate the number of moles of H2 produced.

                (a) 5 mol                            (b) 10 mol

               (c) 20 mol                            (d) 2.5 mo

Answer 1

ANSWER SHOUD BE "a".

EXPLANATION ......

Zn reacts with HCl and form ZnCl₂ and H₂ .

Balance Reaction is Zn + 2HCl ----- ZnCl₂ + H₂ .

When 10 mol of Zn react with 10 mol of HCl then HCl is Limiting Reagent So HCl Completely React .........

So , 2mol of HCl gives 1 mol of H₂ from Balance Reaction ..

So , 10 mol of HCl gives 5 mol of H₂ gas from Balance Reaction ..

finally So , 5 moles of H₂ gas are produced .