Organic Chemistry – Some Basic Principles and Techniques

IUPAC name of following hydrocarbon(X) is : CH3- CH3 |CH-CH2- (X)CH2- CH3 |CH- CH3 |CH-CH2-CH3

1. 2,5,6-Trimethyloctane
2. 2-Ethyl-2,6-diethylheptane
3. 3,4,7-Trimethyloctane
4. 2-Ethyl-3,6-dimethylheptane

Total number of aromatic compounds among the following compounds is . [figure]

Functional group present in sulphonic acids is :

1. -SO2
2. [figure]
3. -SO3H
4. -SO4H

[figure] The correct arrangement for decreasing order of electrophilic substitution for above compounds is :

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

Number of carbocations from the following that are not stabilized by hyperconjugation is . [figure]

Number of and bonds present in ethylene molecule is respectively :

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

The correct nomenclature for the following compound is : [figure]

1. 2-carboxy-4-hydroxyhept-7-enal
2. 2-formyl-4-hydroxyhept-7-enoic acid
3. 2-carboxy-4-hydroxyhept-6-enal
4. 2-formyl-4-hydroxyhept-6-enoic acid

What will be the decreasing order of basic strength of the following conjugate bases? -OH, R O, CH3CO O, C l

1. C l > R O > -OH > CH3CO O
2. -OH > R O > CH3CO O > C l
3. C l > -OH > R O > CH3CO O
4. R O > -OH > CH3CO O > C l

Match List I with List II : Choose the correct answer from the options given below :

1. (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
2. (A) - (II), (B) - (IV), (C) - (III), (D) - (I)
3. (A) - (III), (B) - (I), (C) - (II), (D) - (IV)
4. (A) - (IV), (B) - (III), (C) - (I), (D) - (II)

Which among the following is incorrect statement?

1. The electromeric effect is a temporary effect
2. Hydrogen ion (H+) shows negative electromeric effect
3. The organic compound shows electromeric effect in the presence of the reagent only.
4. Electromeric effect dominates over inductive effect