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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.

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a

(i) and (ii)

b

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

c

(ii), (iii) and (iv)

d

(i) and (iv)

answer is B.

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Detailed Solution

NaH.CO3+CH3COOHCH3COONa+CO2+H2O 

CO2  gas will form in the reaction. and it has the following properties:

(i) It turns lime water milky.      

(ii) It extinguishes a burning splinter.

(iii) It dissolves in a solution of sodium hydroxide

 

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