IUPAC  name of  is: 

1. 2-Chloro-3-iodo-2-pentene

2. 2-Chloro-3-iodo-3-pentene

3.  2-Iodo-3-chloro-pentene

4.  None of the above

2-Butene shows geometrical isomerism due to:

1. Restricted rotation about double bond

2. Free rotation about double bond

3. Free rotation about single bond

4. Chiral carbon

Find the dihedral angle in the staggered form of ethane.

1. $0°$

2. $120°$

3. $60°$

4. $180°$

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

1.		2.
3.		4.

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

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:

The compound that is least reactive towards nucleophilic substitution reaction is:

1. ${\mathrm{CH}}_2=\mathrm{CHCl}$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}$

3. ${\mathrm{CH}}_2={\mathrm{CHCH}}_2\mathrm{Cl}$

4. ${\left({\mathrm{CH}}_3\right)}_3\mathrm{C}-\mathrm{Cl}$

R and S enantiomers differ in:

1. Chemical properties

2. Solubility in achiral solvent

3. Rotation of plane polarised light.

4. Dipole moment

The IUPAC name of the following is: 
CH₂ = CH – CH₂ – CH₂ – C ≡ CH