Answer:
(a) Cannizzaro reaction
Aldehydes without when treated with concentrated alkali solutions there is disproportionate of aldehyde forming alcohol (by reduction) and acid salt (by oxidation). This reaction is called Cannizzaro reaction.
[1]
(ii)Hell-Volhard Zelinsky reaction (HVZ)
(b)(i)
[1]
(ii)
Propanal
Propanone
Iodoform test ?ve
+ve
Yellow ppt
[1]
(iii)
(ii) Acetophenone
Benzophenone
Iodoform test +ve
-ve
Or
(a) (i)Ethanol to 3-hydroxy butanal
[1]
(ii) Benzaldehyde to benzophenone
[1]
(b)
Thus, (C) is
Thus, Ais
[1]
B is [1]
C is
Phenol
Benzoic acid
Neutral solution colour gives violet solution no reaction
Gives buff-coloured ppt. Gives brisk effervescence due to
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