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Question

C7H16 has 9 isomers How many of these isomers have quaternary carbons?

A
1
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B
2
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C
3
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D
4
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Solution

The correct option is D 3

Heptane chemical formula is C7H16
Quaternary carbon is a carbon atom which is bonded to 4 other atoms
Isomers which contain quaternary carbons are (from the above figure)
1. 2,2-dimethylpentane
2. 3,3-dimethylpentane
3. 2,2,3-trimethylbutane

493614_223519_ans.gif

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