Question:
Identify the correct pair of functional isomers.
Identify the correct pair of functional isomers.
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Functional isomers have the same molecular formula but different functional groups.
Updated On: Nov 12, 2026
- Ethyl alcohol and propanone
- Ethene and propyne
- n-Butane and isobutane
- Ethyl alcohol and dimethyl ether
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Functional isomers share a molecular formula but contain different functional groups.
Step 2: Check each pair
Ethyl alcohol (\(\text{C}_{2}\text{H}_{6}\text{O}\)) and propanone (\(\text{C}_{3}\text{H}_{6}\text{O}\)) have different formulae.
Ethene (\(\text{C}_{2}\text{H}_{4}\)) and propyne (\(\text{C}_{3}\text{H}_{4}\)) differ in formula.
n-Butane and isobutane are chain isomers.
Ethyl alcohol and dimethyl ether (\(\text{CH}_{3}\text{OCH}_{3}\)) are both \(\text{C}_{2}\text{H}_{6}\text{O}\), an alcohol and an ether.
Step 3: Compare the options
So the correct pair is ethyl alcohol and dimethyl ether, option (D).
Final Answer:
Ethyl alcohol and dimethyl ether are functional isomers. \[ \boxed{\text{(D) }\text{Ethyl alcohol and dimethyl ether}} \]
Functional isomers share a molecular formula but contain different functional groups.
Step 2: Check each pair
Ethyl alcohol (\(\text{C}_{2}\text{H}_{6}\text{O}\)) and propanone (\(\text{C}_{3}\text{H}_{6}\text{O}\)) have different formulae.
Ethene (\(\text{C}_{2}\text{H}_{4}\)) and propyne (\(\text{C}_{3}\text{H}_{4}\)) differ in formula.
n-Butane and isobutane are chain isomers.
Ethyl alcohol and dimethyl ether (\(\text{CH}_{3}\text{OCH}_{3}\)) are both \(\text{C}_{2}\text{H}_{6}\text{O}\), an alcohol and an ether.
Step 3: Compare the options
So the correct pair is ethyl alcohol and dimethyl ether, option (D).
Final Answer:
Ethyl alcohol and dimethyl ether are functional isomers. \[ \boxed{\text{(D) }\text{Ethyl alcohol and dimethyl ether}} \]
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