See image — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

# Analysis of Diethyl Ether and Methyl n-Propyl Ether **Step 1: Write the structures** - Diethyl ether: $CH_3CH_2-O-CH_2CH_3$ or $C_2H_5-O-C_2H_5$ - Methyl n-propyl ether: $CH_3-O-CH_2CH_2CH_3$ or $CH_3-O-C_3H_7$ **Step 2: Verify molecular formula** Both compounds have the formula $C_4H_{10}O$ (same molecular formula is essential for isomerism). **Step 3: Identify the isomerism type** These compounds have: - **Same molecular formula** ($C_4H_{10}O$) - **Same functional group** (both are ethers, $-O-$) - **Different carbon chain arrangements** around the oxygen atom The ether group remains, but the alkyl groups attached to oxygen differ in their carbon skeleton arrangement. **Step 4: Define functional isomerism** Functional isomers have the same molecular formula but **different functional groups or different arrangement of the same functional group** that leads to different chemical properties. **Conclusion:** These are **functional isomers** because they are both ethers with identical molecular formulas but structurally different alkyl arrangements around the oxygen. **Answer: (2) Functional isomers**