Question

Match List-I with List-II.

List-I (Name of Gas)	List-II (Chemical Formula)
(A) Methane	(I) \( \mathrm{C_3H_8} \)
(B) Ethane	(II) \( \mathrm{CH_4} \)
(C) Propane	(III) \( \mathrm{C_4H_{10}} \)
(D) Butane	(IV) \( \mathrm{C_2H_6} \)

Choose the correct answer from the options given below.

• (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:

Recall the standard Greek prefixes for organic chains: Meth- (1), Eth- (2), Prop- (3), and But- (4).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Alkanes are saturated hydrocarbons with the general chemical formula $\text{C}_n\text{H}_{2n+2}$. They are named based on the number of carbon atoms ($n$) they contain.

Step 2: Detailed Explanation:
Let's match the standard alkanes with their chemical formulas:
- (A) Methane ($n=1$) $\rightarrow$ $\text{CH_4$} (II)
- (B) Ethane ($n=2$) $\rightarrow$ $\text{C_2\text{H}_6$} (IV)
- (C) Propane ($n=3$) $\rightarrow$ $\text{C_3\text{H}_8$} (I)
- (D) Butane ($n=4$) $\rightarrow$ $\text{C_4\text{H}_{10}$} (III)
This matches Option

Step 3: Final Answer:
The correct match is (A) - (II), (B) - (IV), (C) - (I), (D) - (III).