Question 55

The number of different chain isomers for C₇H₁₆ is ______.


Correct Answer: 9

C₇H₁₆ is heptane. The chain isomers are:

1. n-heptane

2. 2-methylhexane

3. 3-methylhexane

4. 2,2-dimethylpentane

5. 2,3-dimethylpentane

6. 2,4-dimethylpentane

7. 3,3-dimethylpentane

8. 3-ethylpentane

9. 2,2,3-trimethylbutane

Total = 9 isomers.

The answer is 9.

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