Question

Homologous series in the following are : (i) $C_2H_4$ and $C_3H_6$
(ii) $CH_3OH$ and $CH_3CHO$
(iii) $HCHO$ and $CH_3CHO$
The correct option in context of the above is :

• A. (i) and (ii)
• B. (i) and (iv)
• C. (ii) and (iv)
• D. (i) and (iii)

Hint:

Homologous series are groups of organic compounds that differ by a constant structural unit, such as a CH_2 group.

Answer 1

The Correct Option is D

The compounds in options (i) and (iii) are part of homologous series.
- $C_2H_4$ (ethene) and $C_3H_6$ (propene) are alkenes, which form a homologous series.
- $HCHO$ (formaldehyde) and $CH_3CHO$ (acetaldehyde) are aldehydes, which also form a homologous series.