The hydrocarbon which can react with sodium in liquid ammonia is:

1. CH₃CH₂C≡CH

2. CH₃CH=CHCH₃

3. CH₃CH₂C≡CCH₂CH₃

4. CH₃CH₂CH₂C≡CCH₂CH₂CH₃

In the following sequence of reactions, the alkene CH₃CH=CHCH₃ undergoes ozonolysis followed by reductive workup (O₃, Zn/H₂O). The product formed is represented as ‘B’.

\(CH_3CH=CHCH_3 \xrightarrow {O_3} A \xrightarrow [Zn] { H_2O} B\),
Identify compound B.
 

1. ${\mathrm{CH}}_3{\mathrm{COCH}}_3$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{COCH}}_3$

3. ${\mathrm{CH}}_3\mathrm{CHO}$

4. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}$

The electrophile, E^⊕ attacks the benzene ring to generate the intermediate σ-complex. Of the following, which σ-complex is of the lowest energy?

1.		2.
3.		4.

Which of the following reactions will yield 2,2-dibromopropane?

1. CH₃–C≡CH + 2HBr →

2. CH₃CH=CHBr + HBr →

3. CH≡CH + 2HBr →

4. CH₃–CH=CH₂ + HBr →

The reaction of toluene with Cl₂ in the presence of FeCl₃ gives predominantly:

1. Benzoyl chloride

2. Benzyl chloride

3. o-and p-Chlorotoluene

4. m-Chlorotoluene

The presence of a nitro group in a benzene ring:

Which one of the following conformations of cyclohexane is chiral?

1. Twist boat

2. Rigid

3. Chair

4. Boat

The treatment of \(\text {CH}_ 3 \text {MgX}\) with \(\text {CH}_ 3 \text {C ≡ CH}\) produces which of the following?

1. \(\text {CH}_ 3 \text C ≡ \text C \text {CH}_ 3\)

2. \(\text {CH}_ 3-\text {CH} = \text {CH}- \text {CH}_3\)

3. \(\text {CH}_ 4\)

4. \(\text {CH}_ 3 - \text {CH} = \text {CH}_ 2\)

The number and type of bonds between two carbon atoms in calcium carbide are:

The isomer of hexane that can yield two different monochlorinated products among the five isomers is: