The common name of isopropyl benzene is

Benzene was discovered by

In the nitration of benzene,concentrated $HNO_3$ acts as a:

For isomeric hydrocarbons with molecular formula $C_9H_{12}$ that give a negative Baeyer's test,determine the total number of isomers that possess four different non-aliphatic substitution sites.

Cyclopentadiene is much more acidic than cyclopentane. The reason is that

Benzene + $CH_3CH_2CH_2CH_2Cl \xrightarrow{AlCl_3}$ hydrocarbon $(X)$. The major product $X$ is: