AH2−−−−−−−→Pd−BaSO4C6H5−CHO(i)SnCl2/HCl←−−−−−−−−(ii)H2OB
A and B respectively are -
A
Benzoyl chloride and benzonitrile
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B
Benzyl chloride and benzylnitrile
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C
Benzal chloride and benzonitrile
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D
Benzotrichloride and benzonitrile
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Solution
The correct option is A Benzoyl chloride and benzonitrile When benzoyl chloride reacts with H2 in the presence of Pd−BaSO4, benzaldehyde will be formed. This reaction is known as Rosenmund's reaction. When benzonitrile reacts with SnCl2/HCl followed by hydrolysis, benzaldehyde will be formed. This reaction is known as Stephen's reaction. Hence the correct answer will be option (a).