Organic Chemistry – Some Basic Principles and Techniques

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

Correct order of stability of carbanions is : [figure]

1. d > c > b > a
2. c > b > d > a
3. d > a > c > b
4. a > b > c > d

The total number of 'sigma' and 'pi' bonds in 2-oxohex-4-ynoic acid is .

Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and electrons is .

Ionic reactions with organic compounds proceed through : Choose the correct answer from the options given below :

1. (A) only
2. (B) only
3. (C) only
4. (D) and (E) only

The functional group that shows negative resonance effect is :

1. -OH
2. -OR
3. -COOH
4. -NH2

A species having carbon with sextet of electrons and can act as electrophile is called

1. pentavalent carbon
2. carbon free radical
3. carbanion
4. carbocation

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

1. Statement I is incorrect but Statement II is correct.
2. Statement I is correct but Statement II is incorrect.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.

Which of the following molecule/species is most stable?

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

Structure of 4-Methylpent-2-enal is :

1. H2C= H |C- CH3 | H |C-CH2- O \|C-H
2. CH3-CH2- CH3 |C=CH- O \|C-H
3. CH3- CH3 |CH-CH=CH- O \|C-H
4. CH3-CH2-CH= CH3 |C- O \|C-H

The correct stability order of carbocations is

1. (CH3)3C > CH3- CH2 > (CH3)2 CH > CH3
2. (CH3)3 C > (CH3)2 CH > CH3- CH2 > CH3
3. CH3 > CH3- CH2 > CH3- CH3 | CH > (CH3)3C
4. CH3 > (CH3)2 CH > CH3- CH2 > (CH3)3 C

IUPAC name of following compound is : CH3- NH2 |CH-CH2-CN

1. 2-Aminobutanenitrile
2. 3-Aminopropanenitrile
3. 2-Aminopentanenitrile
4. 3-Aminobutanenitrile

The difference in energy between the actual structure and the lowest energy resonance structure for a given compound is

1. electromeric energy
2. resonance energy
3. ionization energy
4. hyperconjugation energy

The interaction between bond and lone pair of electrons present on an adjacent atom is responsible for

1. Resonance effect
2. Electromeric effect
3. Hyperconjugation
4. Inductive effect

Number of compounds among the following which contain sulphur as heteroatom is . Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine

According to IUPAC system, the compound [figure] is named as

1. Cyclohex-2-en-1-ol
2. 1-Hydroxyhex-2-ene
3. Cyclohex-1-en-3-ol
4. Cyclohex-1-en-2-ol

The ascending acidity order of the following H atoms is [figure]

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

The total number of 'Sigma' and 'Pi' bonds in 2-formylhex-4-enoic acid is .

Which of the following is strongest Bronsted base?

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

Which of the following has highly acidic hydrogen?

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

Cyclohexene [figure] is type of an organic compound.

1. Benzenoid aromatic
2. Benzenoid non-aromatic
3. Acyclic
4. Alicyclic

IUPAC name of following compound (P) is: [figure]

1. 1-Ethyl-5,5-dimethylcyclohexane
2. 3-Ethyl-1,1-dimethylcyclohexane
3. 1-Ethyl-3,3-dimethylcyclohexane
4. 1,1-Dimethyl-3-ethylcyclohexane

Among the given organic compounds, the total number of aromatic compounds is [figure]

The order of relative stability of the contributing structure is : [figure] Choose the correct answer from the options given below :

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

Bond line formula of HOCH(CN)2 is :

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

The molecular formula of second homologue in the homologous series of mono carboxylic acids is

1. C2H4O2
2. C2H2O2
3. CH2O
4. C3H6O2