Reaction of a carbonyl compound with one of the following reagents involves nucleophilic

addition followed by the elimination of water. The reagent is:

1. a Grignard reagent

2. hydrazine in presence of feebly acidic solution

3. hydrocyanic acid

4. sodium hydrogen sulphite

The reaction by which benzaldehyde cannot be prepared?

Predicts the products in the given reaction,

Which of the following reactions will not result in the formation of carbon-carbon bonds ?

1. Reimer-Tiemann reaction

2. Cannizaro reaction

3. Wurtz reaction

4. Friedel-Crafts acylation

Which one of the following on treatement with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid ?

(1) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{CHO}$

(2) ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}$

(3) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{CHO}$

(4) $C{H}_3-\stackrel{\stackrel{O}{\left|\right|}}{C}-C{H}_3$

Consider the following compounds :

The Correct decreasing order of their reactivity towards hydrolysis is : 

(1) (ii) > (iv) > (iii) > (i)

(2) (i) > (ii) > (iii) > (iv)

(3) (iv) > (ii) > (i) > (iii)

(4) (ii) > (iv) > (i) > (iii)

A carbonyl compound reacts with hydrogen cyanide to form  cyanohydrin which on hydrolysis forms a racemic mixture of a-hydroxy acid. The carbonyl compound is  :

(1) acetaldehyde

(2) acetone

(3) diethyl ketone

(4) formaldehyde

Self-condensation of two moles of ethyl acetate in the presence of sodium ethoxide yields :

(1) ethyl butyrate

(2) acetoacetic ester

(3) methyl acetoacetate

(4) ethyl propionate

An ester that gets hydrolyzed most easily under alkaline conditions is:

1.		2.
3.		4.