Question

3. Arrange the following compounds in order of increasing boiling points (1 Mark):
a. ethyl alcohol (CH3CH2OH), ethylene glycol (HOCH2CH2OH) and glycerol (HOCH2CHOHCH2OH).
b. C2H4, CH4, Ne, H3COCH3.

Answer 1

The increasing order of boiling points is -

a. Glycerol > Ethylene glycol > Ethyl alcohol

b. Methoxymethane > Ethylene > Methane > Neon

Explanation:

Boiling point of asubstance is the temperature at which liquid tuns into vapour.

Boiling point of ethyl alcohol is 78.37 °C, Ethylene glycol is 198 °C and Glycerol is 290 °C

Boiling point of C₂H₄ or Ethylene is -103.7 °C, CH₄ or methane is -161.5 °C, Neon is -246 °C, CH₃OCH₃ or methoxymethane is -24 °C