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  4. How many chain isomers of pentane can also exhibit optical isomerism?

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Q. How many chain isomers of pentane can also exhibit optical isomerism?

Organic Chemistry – Some Basic Principles and Techniques

Solution:

Pentane $\left( C _{5} H _{12}\right)$ has three chain isomers.
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Chain isomers of pentane do not contain any chiral $C$-atom.
Thus, the number of optical isomers of pentane is zero.