Which of the following pairs are enantiomers?                

1. 

2. 

3. 

4. 

The pair that represents chain isomers is- 

Mark the correct option concerning the below-given structures:

​      

1. Resonating structures

2. Tautomers

3. Geometrical isomers

4. Optical isomers

Fischer 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.

The general formula for cycloalkanes is:

1. C_nH_2n+2             2. C_nH_2n

3. C_nH_2n-2              4. C_nH_2n+1

The IUPAC name of the compound CH₃CONH(Br) is:

1. 1-Bromoacetamide           

2. N-Bromoethanamide

3. Ethanoyl bromide             

4. None of the above

The correct IUPAC name of (C₂H₅)₄C is:

1. Tetraethyl methane         

2. 2-Ethylpentane

3. 3,3-Diethylpentane         

4. None of the above.

IUPAC name of the compound,  is:

1. 1-chloro-2,3-epoxypropane

2. 3-chloro-1,2-epoxypropane

3. 1-chloroethoxymethane

4. none of the above

The structure of cis-bis (propenyl) ethene is:

1. 

2. 

3. 

4. 

Which of the following species is paramagnetic?

1. A carbocation                     

2. A free radical

3. A carbanion ion                 

4. All of the above