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Solution


Q.

Sodium hydrogen carbonate 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.
1 (i) and (ii)  
2 (i), (ii) and (iii)  
3 (ii), (iii) and (iv)  
4 (i) and (iv)  

Ans.

(2)

The gas evolved is carbon dioxide gas and it has the property to extinguish a burning splinter. It can turn lime water milky and gets dissolved in a solution of sodium hydroxide to form sodium carbonate. It is an odourless gas, hence the statement (iv) is false.