The chiral centre is absent in:

1. DCH₂-CH₂-CH₂-Cl

2. CH₃-CHD-CH₂-Cl

3. CH₃-CHCl-CH₂D$\mathrm{ \; }$

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:

The number of chiral carbons in β–D–(+)– glucose is:

1. Six

2. Three

3. Four

4. Five 

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