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.
2.
3.
4.
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
1. | 1, 5-Hexenyne | 2. | Hex-1-en-5-yne. |
3. | 1-Hexyne-5-ene | 4. | 1, 5-Hexynene |
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.
In the steam distillation of toluene, the pressure of toluene in the vapour is:
1. | Equal to the pressure of the barometer |
2. | Less than the pressure of the barometer |
3. | Equal to vapour pressure of toluene in simple distillation |
4. | More than the vapour pressure of toluene in simple distillation |
IUPAC name of the compound given below is:
1. | 4-Ethyl-3-methyloctane | 2. | 3-Methyl-4-ethyloctane |
3. | 2, 3-Diethylheptane | 4. | 5-Ethyl-6-methylocatane |
Pairs of compounds among the following is a pair of enantiomers:
1. | |
2. | |
3. | |
4. |