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Q.

2–Pentanone and 3–methylbutan-2-one are

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a

 geometrical isomers

b

tautomer

c

chain isomers

d

optical isomers

answer is C.

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Detailed Solution

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Chain isomerism is a type of structural isomerism in which molecular formula is the same but the arrangement of the carbon chain is different.

Pentan 2 one and 3 methylbutan 2 one are a pair of

Hence, the correct option is (C). Chain isomer.

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