Final answer:
Isopropylbenzene does not contain a tertiary hydrogen because all the hydrogen atoms are bonded to primary carbon atoms in the methyl groups of the isopropyl chain.
Step-by-step explanation:
The question asks whether isopropylbenzene, also known as cumene, contains a tertiary hydrogen. The structure of isopropylbenzene consists of a benzene ring with an isopropyl group (CH3)2CH- attached to it. To determine if there is a tertiary hydrogen, we examine the isopropyl group. This group contains a central carbon bonded to two methyl groups (CH3) and to the benzene ring. This central carbon is tertiary, but all the hydrogen atoms in the isopropyl group are bonded to the methyl carbons, which are primary carbons. Therefore, there are no tertiary hydrogens directly attached to the tertiary carbon in isopropylbenzene. The correct answer is:
b. No