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