Question

An organic compound C₂H₄O₂ is taken in a test-tube and a pinch of baking soda is added to it. A gas is evolved which turns lime water milky.
(a) Name the gas evolved.
(b) Name the functional group present in the organic compound.
​(c) Write the name and formula of the organic compound.

Answer 1

(a) The reaction of C₂H₄O₂ with baking soda will produce carbon dioxide gas which turns lime water milky.

${\mathrm{CH}}_3\mathrm{COOH}+{\mathrm{NaHCO}}_3\to {\mathrm{CH}}_3\mathrm{COONa}+{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$

(b) The functional group present in the organic compound will be carboxylic acid (COOH).

(c) The name of the molecule will be ethanoic acid and the molecular formula of organic compound will be CH₃COOH.