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

 ${\mathrm{H}}_3{\mathrm{CO}}^{-}$ ion is a-

1. carbocation

2. nucleophile

3. electrophile

4. carboanion