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Match the column I with column II and mark the appropriate choice

Column I Column II
A) Clemmensen reduction i) Conc. KOH
B) Rosenmund reduction ii) Zn/Hg + conc. HCl
C) Iodoform reaction iii) H₂/Pd-BaSO₄
D) Cannizzaro reaction iv) NaOH + I₂
A B C D
(1) i iii ii iv
(2) iii iv i ii
(3) ii iii iv i
(4) iv i ii iii

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answer is C.

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Detailed Solution

The carbonyl group of aldehydes and ketones is reduced to CH₂ group on treatment with zincamalgam and concentrated hydrochloric acid through Clemmensen reduction.
Acyl chloride (acid chloride) is hydrogenated over catalyst, palladium
on barium sulphate. This reaction is called Rosenmund reduction.
Aldehydes and ketones having at least one methyl group linked to the carbonyl carbon atom (methyl ketones) are oxidized by NaOH & I₂ to sodium salts of corresponding carboxylic acids having one carbon atom less than that of
carbonyl compound through Iodoform reaction.
Aldehydes which do not have a α-hydrogen atom, undergo self oxidation and reduction (disproportionation) reaction on heating with concentrated alkali(NaOH or KOH) through cannizzaro reaction.

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