Illustration 1. How will you affect the following conversions? 



Solution: (i)

Illustration 2.  An organic compound A (C4H8O3), acidic in nature, is oxidised to give B which on gentle heating produces C, (C3H6O) and CO2. A on heating yields D (C4H6O2) having an acid neutralization equivalent of 86. What are A, B and C ?

Solution:  A on heating produces D (C4H6O2). It clearly tells us that it is dehydration reaction and A must be a b – hydroxyl acid.
Sa as is  and D is CH3 – CH = CH ¾ COOH

(Because if a carbonyl group is present b to carboxylic group, the compound undergoes decarboxylation on heating)

 Illustration 3. Formic acid is obtained when

(A) calcium acetate is heated with conc. H2SO4

(B) glycerol is heated with oxalic acid    

(C) acetaldehyde is oxidised with K2Cr2O7 and H2SO4

(D) calcium formate is heated with calcium acetate

Solution: (B)

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Class 12 Chemistry Aldehydes, Ketones and Carboxylic Acids All Topic Notes Class 12 Chemistry All Chapters Notes