1. Dichloromethyl cation \((^{+}CHCl_{2})\)
2. Formyl cation \((^{+}CHO)\)
3. Dichloromethyl anion \((^{-}CHCl_{2})\)
4. Dichlorocarbene (:CCl2)
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to:
| 1. | Formation of intramolecular H-bonding | 
| 2. | Formation of carboxylate ion | 
| 3. | More extensive association of carboxylic acid via van der waals force of attraction | 
| 4. | Formation of intermolecular H-bonding | 
A, X, Y, and Z in the above-mentioned reaction are:
 
| A | X | Y | Z | |
| 1. | Methoxy- methane | Ethanol | Ethanoic acid | Semicarbazone | 
| 2. | Ethanal | Ethanol | But - 2 - enal | semicarbazone | 
| 3. | Ethanol | Acetaldehyde | Butanone | Hydrazone | 
| 4. | Methoxy- methane | Ethanoic acid | Acetate | Hydrazine | 
Which product is generated when cyclohexanone undergoes aldol condensation and is subsequently heated?
| 1. | 2. | ||
| 3. | 4. | 
In the below reaction, the structure of "A" is:
| 1. | 2. | ||
| 3. | 4. | 
What is the correct order of the carboxylic acids' strength?
| I. | II. | III. | 
| 1. | I > II > III | 2. | II > III > I | 
| 3. | III > II > I | 4. | II > I > III | 
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 equilibration. | 
| 2. | A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation. | 
| 3. | A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates 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. | 
The product formed by the reaction of an aldehyde with a primary amine is:
1. Ketone
2. Carboxylic acid
3. Aromatic acid
4. Schiff base