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