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

The chiral compound among the following is:

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

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.

Pairs of compounds among the following is a pair of enantiomers:

1.
2.
3.
4.

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

1. Six

2. Three

3. Four

4. Five 

The chirality of the compound

1. E

2. R

3. S

4. Z