PRACTICE QUESTIONS SET

Explain the given reaction with the example:

Saponification reaction

Explain the given reaction with the example:

Combustion reaction 

An organic compound 'X' of molecular formula ${\mathrm{C}}_4{\mathrm{H}}_8{\mathrm{O}}_2$ has a sweet smell. It can be hydrolysed with acid or base. On hydrolysis with dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$, it gives two compounds Y' and 'Z'. Y' on oxidation gives compound 'Z'. Identify X, Y and Z. Name the reactions and write the chemical equation of the reactions involved.

An organic compound 'A' with molecular formula ${\mathrm{C}}_2{\mathrm{H}}_4{\mathrm{O}}_2$ is widely used as preservative in pickles. This compound reacts with ethanol to form a sweet-smelling compound 'B' 
(a) Identify the compound A. (b) Write the chemical equations for the reaction involved (c) Name the reaction (d) Name the gas produced when compound 'A' reacts with ${\mathrm{NaHCO}}_3$. Write the chemical reaction involved.
 

How would you bring about the following conversions? Name the process and write the reaction involved. (a) ethanol to ethene. (b) propanol to propanoic acid. Write the reactions.

A compound $\mathrm{C}$ (molecular formula, ${\mathrm{C}}_2{\mathrm{H}}_4{\mathrm{O}}_2$) reacts with $\mathrm{Na}$ metal to form a compound $\mathrm{R}$ and evolves a gas which burns with a pop sound. Compound $\mathrm{C}$ on treatment with an alcohol $\mathrm{A}$ in presence of an acid forms a sweet-smelling compound $\mathrm{S}$ (molecular formula, ${\mathrm{C}}_3{\mathrm{H}}_6{\mathrm{O}}_2$). In addition of $\mathrm{NaOH}$ to $\mathrm{C}$, it also gives $\mathrm{R}$ and water. $\mathrm{S}$ on treatment with $\mathrm{NaOH}$ solution gives back $\mathrm{R}$ and $\mathrm{A}$. Identify $\mathrm{C}, \mathrm{R}, \mathrm{A}, \mathrm{S}$ and write down the reactions involved.

Ethene is formed when ethanol at $443 \mathrm{K}$ is heated with excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation of this reaction. 

A gas is evolved when ethanol reacts with sodium. Name the gas evolved and also write the balanced chemical equation of the reaction involved.