Question

JEE MAINS CHEMISTRY QUESTION SEPTEMBER 2020

Answer 1

Column I Column II

(i) Benzene (a) H2 Pd BaSO4, quinoline

(ii) Benzonitrile (b) CO HCl/Anhy. AlCl3 CuCl

(iii) Benzoyl Chloride (c) SnCl2 + HCl /H3O⁺

which combination gives Benzaldehyde as a major product ?

solution : Treatment of benzene with CO , HCl in the presence of anhydrous AlCl3 and CuCl, gives Benzaldehyde.

so, (i) ⇒(b)

Benzonitrile converts into Benzaldehyde using reagent SnCl2 HCl/H3O+

so, (ii) ⇒(c)

when Benzoyl chloride is treated wirh H2 Pd-BasO4/ quinoline , gives Benzaldehyde as a major product. H2 Pd-BasO4/ quinoline, this is known as lindlar catalyst.

(iii) ⇒(a)

Therefore the correct option is (2)