Prof. Santosh Yadav and Prof. Anil Thomas Solutions for Chapter: Organic Reactions, Exercise 1: Exercise 1

Identify $\text{'}\mathrm{A}\text{'}$ and $\text{'}\mathrm{B}\text{'}$ in the following reaction:

The compounds $\mathrm{A}$ and $\mathrm{B}$ are the structural isomers of each other with the molecular formula ${\mathrm{C}}_{\mathrm{4}}{\mathrm{H}}_{\mathrm{9}}\mathrm{Br}$. Compound $\text{'}\mathrm{A}\text{'}$ is a linear chain and optically inactive while $\text{'}\mathrm{B}\text{'}$ is optically active. When compound $\text{'}\mathrm{A}\text{'}$ is treated with aqueous $\text{KOH}$ solution, it gives compound $\text{'}\mathrm{C}\text{'}$ whereas compound $\text{'}\mathrm{B}\text{'}$ when treated with aqueous $\text{KOH}$ solution, it gives compound $\text{'}\mathrm{D}\text{'}$. Identify compounds $\text{'}\mathrm{C}\text{'}$ and $\text{'}\mathrm{D}\text{'}$.

The compound '$\mathrm{A}$' undergoes Kolbe's reaction in the presence of ${\text{CO}}_{\text{2}}\text{ and NaOH}$ to give the compound '$\mathrm{B}$'. Compound '$\mathrm{B}$' when treated with acetic anhydride in acidic medium, gives acetylsalicylic acid, i.e., aspirin. Identify the compounds '$\mathrm{A}$' and '$\mathrm{B}$'.

Ethyl bromide is subjected to the ammonolysis reaction to give the compound $\text{'}\mathrm{P}\text{'}$. The compound $\text{'}\mathrm{P}\text{'}$ reacts with nitrous acid in cold conditions to give the compound $\text{'}\mathrm{Q}\text{'}$ with the liberation of the nitrogen gas. What is the molecular weight of the compound $\text{'}\mathrm{Q}\text{'}$?

$\underset{(\mathrm{ii}) {\mathrm{H}}^{\mathrm{+}}/{\mathrm{H}}_{\mathrm{2}}\mathrm{O}}{\overset{(\mathrm{i}) {\mathrm{NaBH}}_{\mathrm{4}}}{\to }}\text{'}\mathrm{X}\text{'}\stackrel{{\mathrm{H}}_{\mathrm{2}}{\mathrm{SO}}_{\mathrm{4}}}{\to }\text{'}\mathrm{Y}\text{'}\stackrel{\mathrm{NaOH}}{\to }\text{'}\mathrm{Z}\text{'}$

The compound $\text{'}\mathrm{Z}\text{'}$ in the above reaction is used as an anionic detergent in soap industry. Give the $\left(\mathrm{i}\right)$ hydrophilic and $\left(\mathrm{ii}\right)$ hydrophobic parts of the compound $\text{'}\mathrm{Z}\text{'}$.

Which one of the following polymers belongs to the class of addition polymers? Which catalyst is used to prepare its monomer from ethanol?

$\left(\mathrm{i}\right) \mathrm{PHBV}$ $\left(\mathrm{ii}\right)$ Nylon$-6$

$\left(\mathrm{iii}\right)$ Polyethene $\left(\mathrm{iv}\right)$ Dextron

In the following set of reactions, the alkyl halide is converted into nitrile and Grignard reagent. Both of these are used to further furnish a carboxylic acid containing one carbon atom more than the starting alkyl halide.

What are the reagents $\mathrm{I}, \mathrm{II} \text{and} \mathrm{III}$ in these reactions?

The compound $‘\mathrm{A}’$ is widely used in cosmetics as a nail-polish remover. This compound $‘\mathrm{A}’$ forms compound $‘\mathrm{B}’$, on treatment with hydroxylamine. The compound $‘\mathrm{B}’$ is easily reduced by sodium and ethanol to give isopropylamine. Identify the compound $‘\mathrm{A}’$.