BPSC – Combined Competitive Examination · ప్రశ్న 40
Which of the following are the constituents of a soda-acid fire extinguisher?
సమాధానం చూపించు & వివరణ
సమాధానం: (C) Dil. sulphuric acid and sodium bicarbonate solution
వివరణ
In a soda-acid extinguisher, H₂SO₄ reacts with NaHCO₃ solution to produce CO₂ under pressure.
- (A) తప్పు
Wrong: aluminium sulphate is used in foam extinguishers.
- (B) తప్పు
Wrong: sodium bicarbonate, not carbonate, is used.
- (C) సరైనది
Correct: they react to release CO₂ that smothers the fire.
- (D) తప్పు
Wrong: wrong base and acid strength.