Question Detail
Question
What type of an alkyl group is an isobutyl group?
Correct Answer
Option A is the correct answer.
Detailed Explanation
The isobutyl group (2-methylpropyl, -CH2-CH(CH3)2) is a primary alkyl group because the point of attachment (the carbon bonded to the main chain) is a primary carbon (bonded to only one other carbon).
Hint
What is the point of attachment in an isobutyl group?