Question

the following names are incorrect,draw their structures and supply the correct name.(a)2-isopropylpentane (b)3-ethyl-5-methylhexane

Answer 1

We can't draw structures on the board; however, here is how to name organic compounds. Note the name for 2-isopropylpentane is 2,3-dimethylhexane.

Answer 2

I meant to leave this link in the original response but forgot.
http://www.utdallas.edu/~scortes/ochem/OChem1_Lecture/Class_Materials/07_org_nomenclature1.pdf