A compound A, when reacted with PCl₅ and then with ammonia, gave B. B, when treated with bromine and caustic potash, produced C. C on treatment with NaNO₂ and HCl at $0°$C and on boiling produced ortho-cresol. Compound A is:

1.	o-Toluic acid	2.	o-Chlorotoluene
3.	o-Bromotoluene	4.	m-Toluic acid

Which is the product formed when cyclohexanone undergoes aldol condensation followed by heating ?

The correct structure of product A formed in the reaction

The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is

(1) a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equlibration.

(2) a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly eqilibrates with its corresponding enol and this process is known as carbonylation.

(3) a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly eqilibrates with its corresponding enol and this process is known as keto-enol tautomerism.

(4) a carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol

A single compound of the structure  is obtained from ozonolysis of which of the following cyclic compounds?

1. 

2.  

3.  

4. 

Treatment of cyclopentanone  with methyl lithium gives which of the

following species?

1. Cyclopentanonyl anion

2. Cyclopentanonyl cation

3. Cyclopentanonyl radical

4. Cyclopentanonyl biradical

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

1.		2.
3.		4.

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,