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

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3\stackrel{{\mathrm{NaNH}}_2}{\to }$ 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. ${\mathrm{CH}}_3\mathrm{OH}$

Alkynes can be reduced to alkenes by hydrogenation in presence of:

1. raney Ni 

2. anhy. ${\mathrm{AlCl}}_3$

3. Pd 

4. Lindlar's catalyst

Octane no. of a fuel can be increased by:

1. isomerism 

2. alkylation

3. reforming 

4. all of these

The shortest $\mathrm{C}-\mathrm{C}$ bond distance is found in

1. diamond 

2. ethane

3. benzene

4. acetylene

Benzene reacts with n-propyl chloride in the presence of anhydrous ${\mathrm{AlCl}}_3$ to give

1. 3-propyl-1-chlorobenzene

2. n-propyl benzene

3. no reaction

4. iso-propyl benzene