The correct statement regarding ambident nucleophiles is:

1. Nucleophiles have equal atomic weight.

2. Nucleophiles have only five electrons.

3. Nucleophiles have two nucleophilic sites.

4. Nucleophiles have two electrophilic sites.

Any type of chromatography shares which of the following characteristic?

1. Use of molecules that are soluble in water.

2. Use of inert carrier gas.

3. Calculation of R_f value for the molecule separated.

4. Use of a mobile and a stationary phase.

The number of σ and π bonds in the molecule $C_6{H}_6$ are -

The number of σ and π bonds in the molecule $C_6{H}_{12}$ are:

1. 7 = (${\sigma }_{C-C})$ , 11 =  $\left({\sigma }_{C-H}\right)$, and 0= π 

2. 6 = (${\sigma }_{C-C})$ , 12 =  $\left({\sigma }_{C-H}\right)$, and 0= π 

3. 12 = (${\sigma }_{C-C})$ , 6 =  $\left({\sigma }_{C-H}\right)$, and 1= π 

4. 5 = (${\sigma }_{C-C})$ , 13 =  $\left({\sigma }_{C-H}\right)$, and 1= π 

Indicate the σ and π bonds in this molecule $C{H}_2=C=C{H}_2$

1. two C–C sigma (${\sigma }_{C-C})$ bonds, two C–H sigma $\left({\sigma }_{C-H}\right)$ bonds, and one C=C pi ${\pi }_{C-C}$ bonds

2. four C–C sigma (${\sigma }_{C-C})$ bonds, four C–H sigma $\left({\sigma }_{C-H}\right)$ bonds, and two C=C pi ${\pi }_{C-C}$ bonds

3. two C–C sigma (${\sigma }_{C-C})$ bonds, four C–H sigma $\left({\sigma }_{C-H}\right)$ bonds, and two C=C pi ${\pi }_{C-C}$ bonds

4. two C–C sigma (${\sigma }_{C-C})$ bonds, two C–H sigma $\left({\sigma }_{C-H}\right)$ bonds, and two C=C pi ${\pi }_{C-C}$ bonds

The correct number of σ and π bonds in the molecule $C{H}_{3}N{O}_2$ is:

The correct IUPAC name is -

The correct IUPAC name of the following structure is

The  IUPAC name of the following molecule is -

The species present below is

1. carbocation

2. electrophile

3. nucleophile

4. carboanion