Only two isomeric monochloro derivatives are possible for:

(1) n-butane

(2) 2,4-dimethylpentane

(3) benzene

(4) 2-methylbutane

Keto-enol tautomerism is observed in :

1. 

2. 

3. 

4. None of the above

Isomerism among compounds due to migration of a proton is known as:

1. Geometrical       

2. Optical

3. Tautomerism       

4. Position

Identify the number of different amines corresponding to the molecular formula C₃H₉N.

 Alkyl cyanide \(R-C \equiv N\) and alkyl isocyanides \(R- \overset{+}{N} \equiv C^-\) are: 

Identify the relationship between hydrogen cyanide and hydrogen isocyanide.

1. Tautomers

2. Positional isomers

3. Metamers

4. Chain isomers

Which of the following representations of ethane depicts its non-staggered conformation?

1.		2.
3.		4.	None of these

The optically active compound among the following is-

Which of the following acids shows stereoisomerism?

1. Oxalic acid            

2. Tartaric acid

3. Acetic acid            

4. Formic acid

A racemic mixture is a mixture of:

1. meso and its isomers

2. d- and its l-isomers in equal proportions

3. d- and l-isomers in different proportions

4. meso and d-isomers