Which of the following alkanes will give the maximum number of isomers when a monochloro-substituted product is obtained?

1.		2.
3.	${}_{}$ \(\mathrm{CH_4}\)	4.

What is the minimum number of carbon atoms required for an alkane to have isomers?

1. One                               
2. Two
3. Four                                 
4. Three$$

How many structural isomers of C₅H₁₀ are possible if cyclic structures are excluded?

1. 6

2. 4

3. 5

4. 7