Two possible stereo-structures of CH3CHOH.COOH, that are optically active, called:
1. | Diastereomers | 2. | Atropisomers |
3. | Enantiomers | 4. | Mesomers |
Which of the following compounds will exhibit cis-trans (geometrical) isomerism?
1. 2-butene
2. Butanol
3. 2-butyne
4. 2-butenol
If there is no rotation of plane-polarized light by a compound in a specific solvent
thought to be chiral, it may mean that:
1. The compound is certainly a chiral.
2. The compound is certainly meso.
3. There is no compound in the solvent.
4. The compound may be a racemic mixture.
The number of chiral carbons in β–D–(+)– glucose is:
1. Six
2. Three
3. Four
4. Five
Pairs of compounds among the following is a pair of enantiomers:
1. | |
2. | |
3. | |
4. |
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.
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
The chiral compound among the following is:
1. | 2-Methylpentanoic acid | 2. | Pentanoic acid |
3. | 4-Methyl pentanoic acid | 4. | None of the above |
The chiral centre is absent in:
1. DCH2-CH2-CH2-Cl
2. CH3-CHD-CH2-Cl
3. CH3-CHCl-CH2D
4. CH3-CHOH-CH2-CH3