Polarisation of electrons in acrolein may be written as:
1.
2.
3.
4.
The correct order of –I effect is:
1. -NR3+ > -OR > -F
2. -F > -NR3+ > -OR
3.-NR3+ > -F > -OR
4. -OR > -NR3+ > -F
The correct order of stability is:
1. | 1–butene > Trans–2–butene > Cis–2–butene |
2. | Trans–2–butene > 1–butene > Cis–2–butene |
3. | Trans–2–butene > Cis–2-butene > 1–butene |
4. | Cis-2–butene > Trans–2–butene > 1–butene |
IUPAC name of is:
1. 2-Chloro-3-iodo-2-pentene
2. 2-Chloro-3-iodo-3-pentene
3. 2-Iodo-3-chloro-pentene
4. None of the above
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
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