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Isomerism

Which of the ...

Question

Which of the following pairs of compound are positional isomers?

C H_{3} - C H_{2} - C H_{2} - C | | O - C H_{3}

and

C H_{3} - C H_{2} - C | | O - C H_{2} - C H_{3}

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C H_{3} - C H_{2} - C H_{2} - C | | O - C H_{3}

and

C H_{3} - C | H C H_{3} - C H_{2} - C H O

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C H_{3} - C H_{2} - C O - C H_{2} - C H_{3}

and

(C H_{3})_{2} - C H - C H_{2} - C H O

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C H_{3} - C H_{2} - C H_{2} - C H_{2} - C H O

and

C H_{3} - C H_{2} - C H_{2} - O | | C - C H_{3}

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Solution

The correct option is C $C H_{3} - C H_{2} - C H_{2} - C | | O - C H_{3}$ and $C H_{3} - C H_{2} - C | | O - C H_{2} - C H_{3}$
Position isomers differ in the position of the substituent atom or group or an unsaturated linkage in the same carbon chain.

Thus, 2-pentanone and 3-pentanone (option A) are the position isomers. They differ in the position of the carbonyl group.

In Option B, C, and D all are functional isomers.

Hence, the correct option is (A).

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Similar questions

C H_{3} - C H_{2} - O | | C - C H_{2} - C H_{3}

C H_{3} - C H_{2} - C H_{2} - C H_{2} - C H | C H_{3} - C | C H_{3} - C H_{3} - C H_{2} - C H_{3} | C H - C H_{2} - C H_{2} - C H_{2} - C H_{3}

C H_{3} - C H_{3}, C H_{2} = C H_{2}

C H \equiv C H

S_{N} 2

K I

C H_{3} - C H_{2} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H ∣ C H_{3} - C H_{2} - C l

(I) (I I)

C H_{3} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H_{2} - C H_{2} - B r

(I) (I I)

C H_{3} - C H ∣ C H_{3} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H_{3} ∣ C ∣ C H_{3} - C H_{2} C l

(I) (I I)

C H_{3} - C H_{2} - C H_{2} - B r ∣ C H - C H_{3} a n d C H_{3} - C H_{3} ∣ C H - C H_{2} - B r ∣ C H - C H_{3}

(I) (I I)

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