A racemic mixture is formed by mixing two:

1. Isomeric compounds             

2. Chiral compounds

3. Meso compounds                       

4. Enantiomers

A compound of molecular formula C₇H₁₆ shows optical isomerism, the compound will be

1. 2,3-dimethyl pentane 

2. 2,2-dimethyl butane 

3. 2-methyl hexane 

4. None of the above

Which of the following has an asymmetric carbon atom?

1. 

2. 

3. 

4. 

Stereoisomers (geometrical or optical) that are neither superimposable nor a mirror images to each other are called:

1. Enantiomers             

2. Monomers

3. Tautomers               

4. Diastereomers

Which of the following pairs of carbon skeletons is an example of isomerism?

1. 

2. 

3. 

4. 

Number of isomers possible for C₄H₈ are-

1. 4     

2. 3       

3. 2     

4. 6

The dihedral angle between the hydrogen atoms of two methyl groups in staggered conformation of ethane is:

1. 120° 

2. 180°

3. 90° 

4. 60°

Which of the following acid does not exhibit optical isomerism?

1. Maleic acid                           
2. $\mathrm{\alpha }$-amino acid

3. Lactic acid                             
4. Tartaric acid                             

The prefix used for -SH group as per the IUPAC system is-

1. Mercapto

2. Thiol

3. Sulfide

4. None of the above

The chirality of the compound                           

1. R 

2.  S

3. Z 

4. E