b) 

Distinguish between:
i) C₆H₅-COCH₃ and C₆H₅-CHO
ii) CH₃COOH and HCOOH

c) Arrange the following in the increasing order of their boiling points:
CH₃CHO,CH₃COOH,CH₃CH₂OH

Or

a) Write the chemical reaction involved in Wolff Kishner reduction.

b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction:
C₆H₅COCH₃, CH₃-CHO, CH₃COCH₃

c) why carboxylic acid does not give reactions of carbonyl group ?

d) Write the product in the following reaction

e) A and B are two functional isomers of compound C₃H₆O. On heating with NaOH and I₂, isomers B forms a yellow precipitate of iodoform whereas isomer A does not form any precipitate. Write the formulae of A and B.

b) 

(i)Heat both compounds with NaOH and I₂, C₆H₅COCH₃ forms yellow ppt of CHI₃ whereas C₆H₅CHO does not.
(ii)Add ammoniacal solution of silver nitrate (Tollen’s reagent) to both the compounds, HCOOH gives silver mirror but CH₃COOH does not.

C) CH₃CHO < CH₃CH₂OH < CH₃COOH
Or
a) 
b)C₆H₅COCH₃ < CH₃COCH₃ < CH₃CHO

(c) Because of resonance in the carboxylic group the carbonyl group loses a double bond character.

 d) 
e) A : CH₃CH₂CHO B : CH₃COCH₃