The number of chain isomers of an alkane containing six carbon atoms is
Correct option is C. 5
Chain Isomers of alkane with 6 carbon atoms:
1) $$\mathrm{CH_3-CH_2-CH_2-CH_2-CH_2-CH_3}$$
2) $$\mathrm{CH_3-CH_2-CH_2-CH(CH_3)-CH_3}$$
3) $$\mathrm{CH_3-CH_2-CH(CH_3)-CH_2-CH_3}$$
4) $$\mathrm{^{CH_3}_{CH_3}>CH-CH<^{CH_3}_{CH_3}}$$
5) $$\mathrm{CH_3-C(CH_3)(CH_3)-CH_2-CH_3}$$
So, the no. of isomers are 5.
Hence, Option "C" is the correct answer.