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

The number of different amines corresponding to the formula C₃H₉N is:

1. 2

2. 3

3. 4

4. 5

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

Hydrogen cyanide and hydrogen isocyanide are:

1. tautomers

2. positional isomers

3. metamers

4. chain isomers

The non-staggered form(s) of ethane among the following is-

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

Compounds which rotate plane polarised light clockwise direction are known as:

1. Dextrorotatory

2. Laevorotatory

3. Optically inactive compounds

4. Racemic mixture