The dihedral angle between two C-H bonds in the staggered conformation of ethane  is            

1. 60$°$ 

2. 180$°$

3. 0$°$ 

4. 120$°$

How many stereoisomers does this molecule have?           

CH₃CH=CHCH₂CHBrCH₃

1. 4       

2. 6       

3. 8       

4. 2

Which one of the following can exhibit cis-trans-isomerism?

1. CH₃-CHCl-COOH

2. H-C≡C-Cl

3. Cl-CH=CHCl

4. ClCH₂-CH₂Cl

Fisher projection indicates:

1. horizontal substituents above the plane

2. vertical substituents above the plane

3. both horizontal and vertical substituents below the plane

4. both horizontal and vertical substituents above the plane

Number of monochlorinated products (excluding stereo-isomers) obtained from the given reaction are :

In the following, the most stable conformation of n-butane is                

1.  

2.   

3.  

4. 

The total number of structural isomers is possible for C₅H₁₁Cl is-

1. 6 

2. 8

3. 10 

4. 12

The number of possible isomers of the aromatic compound with molecular formula C₇H₈O are :
1. 3
2. 5
3. 7
4. 9

Diastereomers can be separated by:

1. Recrystallization            

2. simple distillation

3. electrophoresis                     

4. all of these

The number of isomeric structures for C₂H₇N would be:

1. 4 

2. 3

3. 2 

4. 1