Which of the following organic compounds exhibit tautomerism?

I.		II.
III.		IV.

1. I and II

2. I, III and IV

3. I, II and IV

4. I, II, III and IV

The most stable carbocation among the following is-

The compound that is most difficult to protonate is:

1.		2.
3.		4.

Paper chromatography is an example of-

1. Partition chromatography

2. Thin layer chromatography

3. Column chromatography

4. Adsorption chromatography

A liquid compound (X) can be purified by steam distillation only if it is:

1. Steam volatile, immiscible with water.

2. Not steam volatile, miscible with water.

3. Steam volatile, miscible with water.

4. Not steam volatile, immiscible with water.

Incorrectly matched common name with IUPAC name is- 

Arrange the following groups in order of decreasing - I (inductive) effect :

${\mathrm{NO}}_2,$ $\mathrm{C}{\left({\mathrm{CH}}_3\right)}_3,$ ${\mathrm{CH}}_3,$ ${\mathrm{OCH}}_3,$ $\mathrm{Br}$

1.  ${\mathrm{NO}}_2>\mathrm{Br}>{\mathrm{OCH}}_3>\mathrm{C}{\left({\mathrm{CH}}_3\right)}_3>{\mathrm{CH}}_3$

2.  ${\mathrm{NO}}_2>\mathrm{Br}>{\mathrm{OCH}}_3>{\mathrm{CH}}_3>\mathrm{C}{\left({\mathrm{CH}}_3\right)}_3$

3.  ${\mathrm{NO}}_2>{\mathrm{OCH}}_3>\mathrm{Br}>\mathrm{C}{\left({\mathrm{CH}}_3\right)}_3>{\mathrm{CH}}_3$

4.  ${\mathrm{NO}}_2>{\mathrm{OCH}}_3>\mathrm{C}{\left({\mathrm{CH}}_3\right)}_3>\mathrm{Br}>{\mathrm{CH}}_3$

The compounds that show geometrical isomerism among the following are:

a. 2-Butene

b. Propene

c. 1-Phenylpropene

d. 2-Methylbut-2-ene

1. a, b

2. c, d

3. a, b, c

4. a, c

The enolic form of an acetone contains:

1. 9 sigma bonds, 1 pi bond, and 2 lone pairs of electrons

2. 8 sigma bonds, 2 pi bonds, and 2 lone pairs of electrons

3. 10 sigma bonds, 1 pi bond, and 1 lone pair of electrons

4. 9 sigma bonds, 2 pi bonds, and 1 lone pair of electrons

The compound with an isopropyl group is-

1. 2,2,3,3-Tetramethylpentane

2. 2,2-Dimethylpentane

3. 2,2,3-Trimethylpentane

4. 2-Methylpentane