Question

Hydrogen gas is not obtained when zinc reacts with :

• A. cold water
• B. $H_{2}S{O}_4$
• C. $dil.HCl$
• D. hot $20\%$ $NaOH$ solution

Answer 1

The correct option is A cold water

Zinc is a low reactive metal which does not react with cold water and hence no gas is evolved. However, Zn reacts with $dil.HCl$, $dil.H_{2}S{O}_4$ and $hotNaOH$ solution.