Question

Name the gas evolved when zinc is dropped in diluted sulphuric acid.

Answer 1

When zinc dropped in diluted sulphuric acid, hydrogen gas evolved from it.

When a metal reacts with acids to form salts of metal, hydrogen gas is evolved.

Reaction-

$\mathrm{Zn}\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{ZnSO}}_4\left(\mathrm{aq}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$