A colourless organic liquid X of molecular formula C2H4O2 turns blue litmus to red. Another colourless organic liquid Y of molecular formula C3H6O has no action on any litmus but it is used as a nail polish remover. A yet another colourless organic liquid Z of molecular formula C2H6O has also no action on litmus but it is used in tincture of iodine.

(a) Name the liquid X. To which homologous series does it belong? Give the name of another member of this homologous series.
(b) Name the liquid Y. To which homologous series does it belong? Write the name of another member of this homologous series.
(c) Can you name an organic compound having the same molecular formula as liquid Y but which belongs to a different homologous series? What is this homologous series?
(d) Name the liquid Z. To which homologous series does it belong? Write the name of another member of this homologous series.

(a) The liquid 'X' is ethanoic acid as it turns the blue litmus red. It belongs to the homologous series of carboxylic acid.
Methanoic acid is the other member of this homologous series.

(b) The liquid 'Y' is propanone as it is colourless, and is widely used as a nail polish remover. It belongs to the homologous series of ketones.
Butanone is the name of the other member of this homologous series.

(c) Propanal is an organic compound having the same molecular formula as the liquid 'Y' (Propanone). It belongs to the homologous series of aldehydes.

(d) The liquid 'Z' is ethanol as it has no action on the litmus, and is used in the tincture of iodine. It belongs to the homologous series of alcohols. Methanol is the other member of this homologous series.

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Updated on: 10-Oct-2022

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