Benzaldehyde can be obtained from benzal chloride. Write reactions for obtaining benzal chloride and then benzaldehyde from it.
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Solution
Obtaining benzal chloride from toluene
Controlled free radical chlorination of toluene (chlorine in the presence of ultraviolet light) produces benzal chloride.
Obtaining benzaldehyde from benzal chloride
When benzal chloride is heated with dilute NaOH, the formation of benzaldehyde takes place.