Question

A hydrocarbon of pentane has two isomeric forms—n-pentane and iso-pentane. The molecular formula of the n-pentane is C5H12. Predict the molecular formula of the iso-pentane. The choices are:

A) C5H10
B) C5H12
C) C5H9

Answer 1

The correct answer is option B, that is, C5H12.

Step-by-step explanation:

The two isomeric forms of pentane are iso-pentane and n-pentane. The isomeric form of n-pentane is iso-pentane. The isomers exhibit similar molecular formula, however, differ in the atomic arrangement projected in the three-dimensional and the alignment of atoms mainly leading to the formation of a distinct set of characteristics. In this situation, iso-pentane also exhibits a molecular formula of an alkane C5H12.