Question

Amount of hydrogen produced when $H_{2}S{O}_4$ reacts with 32.75 g of zinc is:

• A. $0.25gm$
• B. $0.5gm$
• C. $1gm$
• D. $2gm$

Answer 1

The correct option is C $1gm$

Reaction:
$Zn+H_{2}S{O}_4\to ZnS{O}_4+H_2$
1 1 1
Given moles of Zn $=$ $32.75/65=0.5$ mole
when 0.5 mole Zn reacts with acid, it will form $0.5$ mole hydrogen gas, which will have a mass of 1g.