Question

Name the gas obtained when rock salt reacts with conc. sulphuric acid.

Answer 1

• When rock salt (NaCl) reacts with concentrated sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ fumes of Hydrochloric acid(HCl) is released as a by-product, the chemical equation involved in this reaction is written as:
  $\mathrm{NaCl}\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{s}\right)\to {\mathrm{NaHSO}}_4\left(\mathrm{s}\right)+\mathrm{HCl}\left(\mathrm{g}\right)\uparrow$