Knowing that the sulfonation of benzenes with sulfuric acid is a reversible process, explain how you could leverage this to allow you to make just 1-(1,1-dimethylethyl)-2-nitrobenzen e from (1,1-dimethylethyl)benzene.

1-(1,1-dimethylethyl)-2-nitrobenzene from (1,1-dimethylethyl)benzene can be made in three steps as mentioned below.

Explanation:

(1,1-dimethylethyl)benzene is sulphonated first. Here groups add onto para position to 1,1-dimethylethyl group due to electron donating effect and bulky size of 1,1-dimethylethyl group.

In the second step, nitration of the resulting compound is done. Here nitro group adds onto ortho position to 1,1-dimethylethyl group due to combined presence of ortho orienting 1,1-dimethylethyl group and para orienting group.

Then the resulting compound was heated in presence of strong acid. As sulphonation is a reversible process therefore group leaves benzene ring in this condition.

Schematic represention has been shown below.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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