But-2-ene exhibits cis-trans isomerism due to-

1. Rotation around ${\mathrm{C}}_3-{\mathrm{C}}_4$ sigma bond

2. Rotation around  ${\mathrm{C}}_1-{\mathrm{C}}_2$ bond

3. Restricted rotation around C=C bond

4. Rotation around  ${\mathrm{C}}_2-{\mathrm{C}}_3$ double bond

What is the correct increasing order of the C-C bond length?

1. ${\mathrm{C}}_2{\mathrm{H}}_6>{\mathrm{C}}_2{\mathrm{H}}_4>{\mathrm{C}}_6{\mathrm{H}}_6>{\mathrm{C}}_2{\mathrm{H}}_2$

2. ${\mathrm{C}}_2{\mathrm{H}}_2<{\mathrm{C}}_2{\mathrm{H}}_4<{\mathrm{C}}_6{\mathrm{H}}_6<{\mathrm{C}}_2{\mathrm{H}}_6$

3. ${\mathrm{C}}_2{\mathrm{H}}_6>{\mathrm{C}}_2{\mathrm{H}}_2>{\mathrm{C}}_6{\mathrm{H}}_6>{\mathrm{C}}_2{\mathrm{H}}_4$

4. ${\mathrm{C}}_2{\mathrm{H}}_4>{\mathrm{C}}_2{\mathrm{H}}_6>{\mathrm{C}}_2{\mathrm{H}}_2>{\mathrm{C}}_6{\mathrm{H}}_6$

Which of the following is an isomer of ethanol?

The maximum number of carbon atoms arranged linearly in the molecule,  ${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-\mathrm{CH}={\mathrm{CH}}_{\mathrm{2,}}$ are -

1. 3

2. 4

3. 5

4. 6

The IUPAC name of the above mentioned compound is - 

1. p-Phenyl diphenyl

2. 1,1',4',1''-terphenyl

3. p-1-biphenyl benzene

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