Question:
Identify a pair of compounds that exhibits functional group isomerism from following.
Identify a pair of compounds that exhibits functional group isomerism from following.
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Alcohol vs Ether → classic functional group isomer pair.
Updated On: May 4, 2026
- Methoxymethane and Ethanol
- But-2-ene and But-1-ene
- Methoxyethane and Methoxypropane
- n-Pentane and 2,2-dimethylpropane
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The Correct Option is A
Solution and Explanation
Concept:
Functional group isomerism occurs when compounds have:
• Same molecular formula
• Different functional groups
Step 1: Analyze options.
• (A) Methoxymethane (ether) and Ethanol (alcohol) → same formula, different functional groups \checkmark
• (B) But-1-ene and But-2-ene → position isomers $\times$
• (C) Methoxyethane and Methoxypropane → different molecular formula $\times$
• (D) n-Pentane and 2,2-dimethylpropane → chain isomers $\times$
Step 2: Conclusion. \[ \text{Functional group isomers = Methoxymethane and Ethanol} \]
Functional group isomerism occurs when compounds have:
• Same molecular formula
• Different functional groups
Step 1: Analyze options.
• (A) Methoxymethane (ether) and Ethanol (alcohol) → same formula, different functional groups \checkmark
• (B) But-1-ene and But-2-ene → position isomers $\times$
• (C) Methoxyethane and Methoxypropane → different molecular formula $\times$
• (D) n-Pentane and 2,2-dimethylpropane → chain isomers $\times$
Step 2: Conclusion. \[ \text{Functional group isomers = Methoxymethane and Ethanol} \]
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