Question

When conc. sulphuric acid is added to sodium chloride, sodium bisulphate and gas X is formed. If a rod dipped in ammonia is brought near gas X, dense white fumes of ammonium chloride are formed. What is X?

• A. Chlorine gas
• B. Carbon dioxide gas
• C. Hydrogen chloride gas
• D. Sulphur dioxide gas

Answer 1

The correct option is C

Hydrogen chloride gas

When conc. sulphuric acid is added to sodium chloride, sodium bisulphate and hydrogen chloride gas is formed.

$NaCl+H_{2}S{O}_4\to NaHS{O}_4+HCl$

If a rod dipped in ammonia is brought near hydrogen chloride gas, dense white fumes of ammonium chloride are formed.

$N{H}_3\left(aq\right)+HCl\to N{H}_{4}Cl$