(a) Write the product(s) in the following reactions:
(i) $+ HCN ⟶ ?$
(ii) $+ NaOH \underset{Δ}{\overset{CaO}{⟶} ?}$
(iii) ${CH}_{3} - CH = CH - CN \underset{2}{\overset{(a) DIBAL - H}{⟶}} ?$
(b) Give simple chemical tests to distinguish between the following pairs of compounds :
(i) Butanal and Butan-2-one
(ii) Benzoic acid and Phenol
OR
(a) Write the reactions involved in the following :
(i) Etard reaction
(ii) Stephen reduction
(b) How will you convert the following in not more than two steps :
(i) Benzoic acid to Benzaldehyde
(ii) Acetophenone to Benzoic acid
(iii) Ethanoic acid to 2-Hydroxyethanoic acid

Question

(a) Write the product(s) in the following reactions:
(i) $+ HCN ⟶ ?$
(ii) $+ NaOH \underset{Δ}{\overset{CaO}{⟶} ?}$
(iii) ${CH}_{3} - CH = CH - CN \underset{2}{\overset{(a) DIBAL - H}{⟶}} ?$
(b) Give simple chemical tests to distinguish between the following pairs of compounds :
(i) Butanal and Butan-2-one
(ii) Benzoic acid and Phenol
OR
(a) Write the reactions involved in the following :
(i) Etard reaction
(ii) Stephen reduction
(b) How will you convert the following in not more than two steps :
(i) Benzoic acid to Benzaldehyde
(ii) Acetophenone to Benzoic acid
(iii) Ethanoic acid to 2-Hydroxyethanoic acid

Infinity Learn · Accepted Answer

(a)(i)(ii) (iii) CH3−CH=CH−CN (a) DIBAL-H (b) H2OCH3−CH=CH−CHO(b) (i) Butanal and butan-2-one can be distinguished with Tollen’s test. Butanal gives positive test with Tollen's reagent while butan-2-one give negative test.(ii) Benzoic acid gives a colored buff colored ppt with FeCl3 solution while phenol fives violet color ppt with FeCl3 solution.OR(a) (b) CH3COOH + Cl2→ClCH2COOH→NaOHOHCH2COOH2-hydroxy ethanoic acid

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