Organic Chemistry – Some Basic Principles and Techniques

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

Which compound amongst the following is not an aromatic compound?

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

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

1. 1-bromo-5-chloro-4-methylhexan-3-ol
2. 6-bromo-2-chloro-4-methylhexan-4-ol
3. 1-bromo-4-methyl-5-chlorohexan-3-ol
4. 6-bromo-4-methyl-2-chlorohexan-4-ol

What is the hybridization shown by C1 and C2 carbons, respectively in the given compound? OHC- 1CH=CH- 2CH2COOCH3

1. sp3 and sp3
2. sp2 and sp3
3. sp2 and sp2
4. sp3 and sp2

Which of the following is the most stable carbocation?

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