The correct answer is option 2. CH3CH2OH.
In organic chemistry, arenes are the aromatic hydrocarbons which are cyclic unsaturated compounds which consist of strikingly different chemical properties as compared to conjugated alkenes or polyenes and thus categorized as a separate class of hydrocarbons. The arenes and substituted arenes are highly stabilized by resonance. The simplest member of arene is benzene whose molecular formula is C6H6 and is structurally represented as follows:
Preparation of benzene from benzene diazonium chloride:
When benzene diazonium chloride reacts with ethanol it forms benzene and acetaldehyde along with the removal of nitrogen gas and hydrogen chloride. It is a single step nucleophilic substitution reaction which proceeds as follows:
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