Organic Chemistry – Some Basic Principles and Techniques

The correct IUPAC name of the following compound is : [figure]

1. 3-ethyl-5-methylheptane
2. 3-methyl-5-ethylheptane
3. 2,4-diethylhexane
4. 3,5-diethylhexane

The following carbocation is stabilized by the interaction of the empty p orbital with [figure]

1. empty * and empty * orbitals
2. filled and filled orbitals
3. empty and empty * orbitals
4. empty * and filled orbitals

Arrange the following compounds in the increasing order of polarity A. CH3CH2OCH2CH3 B. CH3CH2OH C. CH3COCH3 D. CH3COOH Choose the correct answer from the options given below.

1. A < C < B < D
2. A < B < C < D
3. C < A < D < B
4. C < A < B < D

Among the given compounds I-III, the correct order of bond dissociation energy of C-H bond marked with * is : [figure]

1. III > II > I
2. II > III > I
3. II > I > III
4. I > II > III

The most stable carbocation among the following is :

1. [figure]
2. [figure]
3. [figure]
4. [figure]

A compound with a molecular formula of C6H14 has two tertiary carbons. Its IUPAC name is :

1. n-hexane
2. 2-methylpentane
3. 2,3-dimethylbutane
4. 2,2-dimethylbutane

The correct IUPAC name of the compound [figure] is :

1. 4-ethyl-1-fluoro-2-nitrobenzene
2. 4-ethyl-1-fluoro-6-nitrobenzene
3. 3-ethyl-6-fluoro-1-nitrobenzene
4. 1-ethyl-4-fluoro-3-nitrobenzene

Methyl group attached to a positively charged carbon atom stabilizes the carbocation due to

1. -I inductive effect
2. electromeric effect
3. hyperconjugation
4. mesomeric effect

The number of bonds, bonds and lone pair of electrons in pyridine, respectively are:

1. 12, 3, 0
2. 11, 3, 1
3. 12, 2, 1
4. 11, 2, 0

Consider the following compounds/species: [figure] The number of compounds/species which obey Hückel's rule is .

1. 6
2. 2
3. 5
4. 4