Which of the following molecules/species are aromatic in character?

                 

     A                      B                          C                               D

1. B

2. C

3. D

4. A

Xylene, on oxidation with acidic ${\mathrm{KMnO}}_4$, gives:

Nitration of benzene is:

1. nucleophilic substitution

2. electrophilic substitution

3. electrophilic addition

4. nucleophilic addition

Which of the following compounds has the lowest boiling point?

1. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

2. ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_2{\mathrm{CH}}_3$

3. ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2$

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

1-butyne on reaction with hot alkaline ${\mathrm{KMnO}}_4$ gives:

1. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{COOH}$ 

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}$ + ${\mathrm{CO}}_2$

3. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}$

4. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}$ + HCOOH

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3\stackrel{{\mathrm{NaNH}}_2}{\to }$ X; what is X?

1. ${\mathrm{CH}}_3-{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{C}\equiv \mathrm{CH}$

3. 

4. ${\mathrm{CH}}_2=\mathrm{C}=\mathrm{CH}-{\mathrm{CH}}_3$

Acetylene on reacting with hypochlorous acid gives:

1. ${\mathrm{CH}}_2\mathrm{Cl}.\mathrm{CHO}$ 

2. ${\mathrm{ClCH}}_2\mathrm{CHO}$

3. ${\mathrm{Cl}}_2\mathrm{CH}.\mathrm{CHO}$

4. ${\mathrm{ClCH}}_2\mathrm{COOH}$

Benzene reacts with ${\mathrm{CH}}_3\mathrm{Cl}$ in the presence of anhy. ${\mathrm{AlCl}}_3$ to form

1. toluene

2. chlorobenzene

3. benzylchloride

4. xylene

$\mathrm{CH}\equiv \mathrm{CH}\stackrel{{\mathrm{O}}_3/\mathrm{NaOH}}{\to }$X$\stackrel{\mathrm{Zn}/{\mathrm{CH}}_3\mathrm{COOH}}{\to }$Y. Y is:

1. ${\mathrm{CH}}_2\mathrm{OH}-{\mathrm{CH}}_2\mathrm{OH}$ 

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

3. ${\mathrm{CH}}_3\mathrm{COOH}$ 

4. ${\mathrm{CH}}_3\mathrm{OH}$

What is the end product of the following sequences of operations?

         ${\mathrm{CaC}}_2\stackrel{{\mathrm{H}}_2\mathrm{O}}{\to }$A$\underset{{\mathrm{Hg}}^{2+}}{\overset{\mathrm{Dil}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}$B $\underset{{\mathrm{H}}_2}{\overset{\mathrm{Ni}}{\to }}$C

1. Methyl alcohol 

2. Acetaldehyde

3. ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$   

4. ${\mathrm{C}}_2{\mathrm{H}}_4$