The salt used in soda acid type extinguisher is [[1]].

Answer:

Sodium bicarbonate

Solution:

The salt used in soda acid type extinguisher is sodium bicarbonate

A soda acid fire extinguisher consists of sulphuric acid and sodium bicarbonate. On pressing the knob, of the fire extinguisher, the sulphuric acid reacts with the soda which forms sodium sulfate and water liberating CO₂. This helps in cutting off the oxygen supply and thus extinguishes the fire.