Question

Pentane with molecular formula C5H12, exists in three isomeric forms. One shows linear carbon chains, another has one -CH3 groups present on the third carbon atom, and the third has two -CH3 groups present on the second carbon atom. What types of isomers are these?

Answer 1

--> Chemistry section

Answer 2

pentane, isopentane and neopentane... if I'm remembering from Organic chem... been like 7 years lol

Answer 3

actually, from what the question says, on second glance...

They are probably referring to the methyl groups..
pentane
isopentane (methylbutane)
neopentane (dimethylpropane)

Answer 4

Constitutional isomers.