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