Organic Chemistry – Some Basic Principles and Techniques

The correct order of stability of following carbocations is : [figure]

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

Which one of the carbocations from the following is most stable?

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

In the given structure, number of sp and sp2 hybridized carbon atoms present respectively are : [figure]

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

The hydrocarbon (X) with molar mass 80 g mol-1 and 90\% carbon has degree of unsaturation.

The correct stability order of the following species/molecules is : [figure]

1. q > r > p
2. q > p > r
3. p > q > r
4. r > q > p

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

1. 5-Methoxycarbonyl-2-methylhexanoic acid
2. Methyl-5-carboxy-2-methylhexanoate.
3. 2-Carboxy-5-methoxycarbonylhexane.
4. Methyl-6-carboxy-2,5-dimethylhexanoate.

The most stable carbocation from the following is :

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

The alkane from below having two secondary hydrogens is :

1. 2,2,4,5-Tetramethylheptane
2. 2,2,4,4-Tetramethylhexane
3. 4-Ethyl-3,4-dimethyloctane
4. 2,2,3,3-Tetramethylpentane

Relative stability of the contributing structures is : [figure]

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

Correct order of basic strength of Pyrrole, Pyridine and Piperidine is : [figure]

1. Pyridine > Piperidine > Pyrrole
2. Pyrrole > Piperidine > Pyridine
3. Pyrrole > Pyridine > Piperidine
4. Piperidine > Pyridine > Pyrrole