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

\(\mathrm{CaC}_2 \xrightarrow{\mathrm{H}_2 \mathrm{O}} \mathrm{~A} \xrightarrow[\mathrm{Hg}^{2+}]{\mathrm{Dil} \cdot \mathrm{H}_2 \mathrm{SO}_4} \mathrm{~B} \underset{\mathrm{H}_2}{\stackrel{\mathrm{Ni}}{\rightarrow}} \mathrm{C}\)

1. Methyl alcohol

2. Acetaldehyde

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

4. ${\mathrm{C}}_2{\mathrm{H}}_4$

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

$\mathrm{R}-\mathrm{CH}={\mathrm{CH}}_2\underset{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\overset{\mathrm{Na}/{\mathrm{NH}}_3\left(\mathrm{l}\right)}{\to }}$${\mathrm{RCH}}_2{\mathrm{CH}}_3$ is called:

1. Clemmensen reduction 

2. Fisher-Spier reduction                   

3. Birch reduction

4. Arndt-Eistert reduction                   

The cylindrical shape of an alkyne is due to 

1. three sigma $\mathrm{C}-\mathrm{C}$ bonds

2. three $\mathrm{\pi }$ $\mathrm{C}-\mathrm{C}$ bonds

3. two sigma $\mathrm{C}-\mathrm{C}$ and one $\mathrm{\pi }$ $\mathrm{C}-\mathrm{C}$ bonds

4. one sigma $\mathrm{C}-\mathrm{C}$ and two$\mathrm{\pi }$ $\mathrm{C}-\mathrm{C}$ bonds

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