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

 and  are-

1. Resonating structures

2. Tautomers

3. Geometrical isomers

4. Optical isomers

Geometrical isomers differ in:

1. Position of the functional group.

2. Position of atoms.

3. Spatial arrangement of atoms.

4. Length of the carbon chain.

The incorrect IUPAC name is:
 

1.
2.
3.
4.

What is the partial pressure of toluene in the vapour phase during its steam distillation?