Which from following pairs of compounds exhibits metamerism?

Which from following pairs of compounds exhibits metamerism?
  1. But-2-ene and But-1-ene
  2. Methoxymethane and Ethanol
  3. Ethoxyethane and Methoxypropane
  4. Butane and 2-Methylpropane

Solution

Ethoxyethane $\left(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_3\right)$ and methoxypropane $\left(\mathrm{CH}_3-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3\right)$ have same functional group as ether but have different distribution of carbon atoms attached to etheral oxygen. Thus, both pair of compounds show metamerism.

Asked in: MHT CET 2024 (04 May Shift 1)

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