Question

When sodium hydrogen carbonate is added to ethanoic acid a gas evolves .Consider the following statements about the gas evolved.Which statement is not correct? *
1 It turns lime water milky.
2 It is evolved with brisk effervescence.
3 It has a smell of burning sulphur
4 It is also a by-product of respiration​

Answer 1

The gas evolved is carbon dioxide

(CO_(2)).

The statements (i), (ii) and (iii) are true about the gas.

Answer 2

The statement '(3) It has a smell of burning sulphur' is not correct.

• When sodium hydrogen carbonate is added to ethanoic acid, a gas is evolved which is carbon dioxide.
• The reaction is:

$NaHCO_{3}+CH_{3}CH_{2}OH$ → $CH_{3}COONa+H_{2}O+CO_{2}$

• The statements other than (3) are correct for carbon dioxide gas.
• It can turn lime water milky when it is passed into it.
• The carbon dioxide gas is evolved by giving a brisk effevescence.
• It is also a by-product of respiration and is released by all animals.