The IUPAC name of the above mentioned compound is - 

1. p-Phenyl diphenyl

2. p-1-biphenyl benzene

3.  1,1',4',1''-terphenyl

4. Terphenyl

The hydrocarbons having the lowest dipole moment among the following is:

1. 

2. CH₃ - C ≡ C - CH₃

3. CH₃ CH₂ CH = CH₂

4. CH₂ = CH - C ≡ CH

The Cl — C — Cl angles in 1,1,2,2-tetrachloroethene and tetrachloromethane will be about :

1. $120°$ $\mathrm{and}$ $109.5°$

2. $90°$ $\mathrm{and}$ $109.5°$

3. $109.5°$ $\mathrm{and}$ $90°$

4. $109.5°$ $\mathrm{and}$ $120°$

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

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 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

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

Incorrectly matched common name with IUPAC name is- 

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-