Which of the following are the constituents of a soda acid fire extinguisher?

Correct answer: (c) Dil. sulphuric acid and sodium bicarbonate solution

Explanation

A soda acid extinguisher uses sodium bicarbonate (NaHCO₃) solution and dilute sulphuric acid (H₂SO₄).

On mixing they react to release carbon dioxide (CO₂), which blankets the fire and cuts off oxygen supply.

The reaction: 2NaHCO₃ + H₂SO₄ → Na₂SO₄ + H₂O + 2CO₂.