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,

Clemmensen reduction of a ketone is carried out in the presence of which of the following ?

1. Zn-Hg with HCl

2. LiAlH₄ 

3. H₂ and Pt as catalyst

4. Glycol with KOH

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

Trichloroacetaldehyde, CCl₃CHO reacts with chlorobenzene in presence of sulphuric acid and produces

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