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  • Sodium hydrogencarbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved? (i) It turns lime water milky (ii) It extinguishes a burning splinter (iii) It dissolves in a solution of sodium hydroxide

Sodium hydrogencarbonate, when added to acetic acid, evolves a gas. Which of the following statements are true about 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)

Answers (1)

Answer: (b)

When sodium hydrogen carbonate is added to acetic acid, carbon dioxide (CO_{2}) gas is formed.

NaHCO_{3}+CH_{3}COOH\; \rightarrow CH_{3}COONa+CO_{2}+H_{2}O

CO_{2} turns lime water milky; it is a non-supporter of combustion and is absorbed by strong alkalis like NaOH.

 

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