Which of the following species is paramagnetic?

1. A carbocation                     

2. A free radical

3. A carbanion ion                 

4. All of the above

IUPAC name of,

 is:

1. 4-Butyl-2,5-hexadien-1-al

2. 5-Vinyloct-3-en-1-al

3. 5-Vinyloct-5-en-8-al

4. 3-Butyl-1,4-hexadien-6-al

The IUPAC name of the given compound is: 
 

1. 1,2-dimethyl-2-butenol

2. 3-methylpent-3-en-2-ol

3. 3,4-dimethyl-2-buten-4-ol

4. 2,3-dimethyl-3-pentenol

IUPAC name of the compound

is:

1. 1,2,3-tricyanopropane

2. Propane-1,2,3-tricarbonitrile

3. 1,2,3-cyanopropane

4. Propane tricarbylamine

Arrange the following compouds in the order of leaving group ability

1. I > II > III > IV

2. IV > III > I > II

3. III > II > I > IV

4. II > III > IV > I

In an S_N1 reaction on chiral center, there is:

1. 100% racemization

2. Inversion is more than retention leading to partial racemization. 

3. 100% retention

4. 100% inversion

Which of the following is the strongest acid?

1. HC $\equiv$ CH

2. C₆H₆

3. C₂H₆

4. CH₃OH

Benzene ring contains

1. 12 $\sigma$ and 3$\pi$

2. 6 $\sigma$ and 3$\pi$

3. 9 $\sigma$ and 3$\pi$

4. 8 $\sigma$ and 2$\pi$

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

1. 

2. 

3. 

4. 

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