The correct IUPAC name of the following structure is

1.	2,4,7-Trimethyloctane	2.	2,5,7-Trimethyloctane
3.	2,3,7-Trimethyloctane	4.	All of the above

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

${\mathrm{Br}}^{-}$ ion is a -

1. carbocation

2. carboanion 

3. electrophile

4. nucleophile

${\mathrm{H}}_3\mathrm{COH}$ molecule is -

1. carbocation

2. nucleophile

3. electrophile

4. carboanion

The species present below is

$\mathrm{R}-\mathrm{NH}-\mathrm{R}$

1. nucleophile

2. carbocation

3. electrophile

4. carboanion

Chlorine atom can be classified as:

$\stackrel{1}{C}{H}_2$ $=\stackrel{2}{C}=O$

The correct hybridization states of carbon atoms in the above compound are - 

The correct hybridization states of carbon atoms marked as 1,2,3 in the following compound are:
\({ }^1 \mathrm{CH}_3-\mathrm{ }^2{C} \mathrm{H}={}^3{\mathrm{C}} \mathrm{H}_2 \)