Sodium hydrogen carbonate when added to acetic acid evolves a gas.

Which of the following statements are true about how the gas evolved?

(i) It turns lime water milky (ii) It extinguishes a burning splinter

(iii) It dissolves in a solution of sodium hydroxide (iv) It has a pungent odour

(A) (i) and (ii) 

(B) (i), (ii) and (iii)

(C) (ii), (iii) and (iv) 

(D) (i) and (iv)



Reaction of Sodium hydrogen carbonate with acetic acid-01.jpg

When sodium hydroxide reacts with acetic acid, it produces Carbon Dioxide (CO 2 ) gas.


And we know that

  • Carbon dioxide turns lime water milky
  • CO 2 works as a fire extinguisher, so it can extinguish the burning candle or splinter 
  • And Carbon Dioxide gets dissolved in sodium hydroxide solution to form sodium carbonate
  • But, Carbon dioxide gas is odourless in nature.


Thus, statement (i), (ii), (iii) are correct, the last statement is false


So, the correct answer is (b) - (i), (ii) and (iii)

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo