Dihedral angle in staggered form of ethane is:
1.
2.
3.
4.
Which of the following is most reactive towards electrophilic substitution reaction?
1. | 2. | ||
3. | 4. |
The best method for the separation of naphthalene and benzoic acid from their mixture is:
1. Sublimation
2. Chromatography
3. Crystallisation
4. Distillation
Which amongst the following is the most stable carbocation:
1. | 2. | ||
3. | 4. |
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
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:
1. | 2-Methylpentanoic acid | 2. | Pentanoic acid |
3. | 4-Methyl pentanoic acid | 4. | None of the above |
The number of chiral carbons in β–D–(+)– glucose is:
1. Six
2. Three
3. Four
4. Five