Question

Match List-I with List-II:

• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
• (A) - (IV), (B) - (II), (C) - (I), (D) - (III)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

Alkanes follow the general formula C$_n$H$_{2n+2}$.

Answer 1

The Correct Option is B

Methane = CH$_4$, Ethane = C$_2$H$_6$, Propane = C$_3$H$_8$, and Butane = C$_4$H$_{10}$.

Answer 2

Formula-derivation approach: Methane, ethane, propane and butane are the first four members of the alkane (paraffin) homologous series, which follows the general formula \( \mathrm{C_{n}H_{2n+2}} \).
For \( n = 1 \): \( \mathrm{CH_{4}} \) (methane). For \( n = 2 \): \( \mathrm{C_{2}H_{6}} \) (ethane). For \( n = 3 \): \( \mathrm{C_{3}H_{8}} \) (propane). For \( n = 4 \): \( \mathrm{C_{4}H_{10}} \) (butane).
Deriving each formula from the general series and matching it to the corresponding compound name, rather than recalling the formulas individually, gives the same correspondence as option (A)-(II), (B)-(IV), (C)-(I), (D)-(III).