In the following reaction sequence:

What is the final product, D?

1.		2.
3.		4.

Nitrobenzene on reaction with conc. HNO₃/H₂SO₄ at 80-100$°$C forms -

1. 1,2-Dinitrobenzene

2. 1,3-Dinitrobenzene

3. 1,4-Dinitrobenzene

4. 1,2,4-Trinitrobenzene

In the following reaction,

Product A is-

1. 

2. 

3. 

4. 

CH₃-C$\equiv$C-H$\stackrel{{\mathrm{CH}}_3\mathrm{MgBr}}{\to }$CH₄ + (A)$\underset{\left(\mathrm{ii}\right) {\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}}{\overset{\left(\mathrm{i}\right) {\mathrm{CO}}_2}{\to }}$(B); (B) is -

1. H₃C-CH₂-CH₂-COOH

2. CH₃-C$\equiv$C-CH₃

3. H₃C-C$\equiv$C-COOH

4. H₃C-CH=CH-COOH

3-Hexyne can be converted to trans-3-Hexene by the action of:

1. ${\mathrm{H}}_2$ - Pd/ ${\mathrm{BaSO}}_4$                       

2. Li-Liq. ${\mathrm{NH}}_3$

3. ${\mathrm{H}}_2$ - Pt ${\mathrm{O}}_2$                               

4. ${\mathrm{NaBH}}_4$

A compound having the shortest carbon-carbon bond length among the following is :

1. Benzene                                 

2. Ethene

3. Ethyne                                   

4. Ethane

Reaction of HBr with propene in the presence of peroxide gives

1. iso-propyl bromide

2. 3-bromo propane

3. allyl bromide

4. n-propyl bromide

In the reaction, ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_3\stackrel{\mathrm{Oxidation}}{\to }$A $\stackrel{\mathrm{NaOH}}{\to }$B$\underset{∆}{\overset{\mathrm{Soda} \mathrm{lime}}{\to }}$C 

the product C is:

1. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{OH}$ 

2. ${\mathrm{C}}_6{\mathrm{H}}_6$

3. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COONa}$

4. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{ONa}$

The compound formed when acetylene is passed through dilute sulphuric acid in the presence of mercury(II) sulphate is:

1. Ether

2. Ketone

3. Acetic acid

4. Acetaldehyde

Why are acetylenic hydrogens acidic?

1. The sigma electron density of the C-H bond in acetylene is closer to carbon, which has 50% s-character.

2. Acetylene has only one hydrogen on each carbon.

3. Acetylene contains the least number of hydrogens among the possible hydrocarbons having two carbons.

4. Acetylene belongs to the class of alkynes with the molecular formula ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}-\mathrm{2 }}$