Dihedral angle in staggered form of ethane is:

1. $0°$

2. $120°$

3. $60°$

4. $180°$

Which of the following is most reactive towards electrophilic substitution reaction?

1.		2.
3.		4.

The best method for the separation of naphthalene and benzoic acid from their mixture is:
1. Sublimation
2. Chromatography
3. Crystallisation
4. Distillation

Which amongst the following is the most stable carbocation:
 

1.		2.
3.		4.

The chirality of the compound

1. E

2. R

3. S

4. Z

The chiral centre is absent in:

1. DCH₂-CH₂-CH₂-Cl

2. CH₃-CHD-CH₂-Cl

3. CH₃-CHCl-CH₂D$\mathrm{<mspace\; width="1em"></mspace>\; <mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>}$

4. CH₃-CHOH-CH₂-CH₃

Which one of the following compounds is most acidic:
 

1.		2.
3.		4.	\(\mathrm{Cl}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{OH}\)

IUPAC name of some compounds is given. The incorrect name is:

1.	: 3-Methyl-4-ethylheptane
2.	: 3-Methyl-2-butanol
3.	: 2-Ethyl-3-methylbut-1-ene
4.	\(\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}\left(\mathrm{CH}_3\right)_2 \): 4-Methyl-2-pentyne

The structure of trans-2-hexenal among the following is:

1.
2.
3.
4.	None of the above

The chiral compound among the following is: