Organic Chemistry – Some Basic Principles and Techniques

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

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