Question

The list of some organic compounds is given below:
ethanol, ethane, methane, ethyne, and ethene
From the above list, name a compound:
(i) formed by the dehydration of ethanol by concentrated sulphuric acid.
(ii) which forms methanoic acid on oxidation in the presence of copper at 200°C.
(iii) which has vapour density 14 and turns acidic potassium permanganate colourless.
(iv) which forms chloroform on halogenation in the presence of sunlight.
(v) which decolourises bromine solution in carbon tetrachloride.

Answer 1

(i) Ethene is formed by the dehydration of ethanol by concentrated sulphuric acid.
(ii) Methane forms methanol on oxidation in the presence of copper at 200°C.
Disclaimer:
The given conditions show oxidation of methane to form methanol but not for methanoic acid.
(iii) Ethene has vapour density 14 and turns acidic potassium permanganate colourless.
(iv) Methane forms chloroform on halogenation in the presence of sunlight.
(v) Ethene or ethyne decolourises bromine solution in carbon tetrachloride.