Multiple Choice Questions (MCQs)

An organic compound $\mathrm{A}$ (molecular formula ${\mathrm{C}}_2{\mathrm{H}}_4{\mathrm{O}}_2$) reacts with $\mathrm{Na}$ metal to form a compound $\mathrm{B}$ and evolves a gas which burns with a pop sound. Compound $\mathrm{A}$ on treatment with an alcohol $\mathrm{C}$ in the presence of a little concentrated sulphuric acid forms a sweet-smelling compound $\mathrm{D}$ (molecular formula ${\mathrm{C}}_3{\mathrm{H}}_6{\mathrm{O}}_2$). Compound $\mathrm{D}$ on treatment with $\mathrm{NaOH}$ solution gives back $\mathrm{B}$ and $\mathrm{C}$. Identify $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$.

Which of the following hydrocarbons can decolourise bromine water and which cannot? Why?

${\mathrm{C}}_6{\mathrm{H}}_{12}, {\mathrm{C}}_6{\mathrm{H}}_{14}, {\mathrm{C}}_6{\mathrm{H}}_{10}$

A neutral organic compound with four carbon atoms $\mathrm{X}$ reacts with sodium metal to evolve a gas which burns with a ‘pop’ sound. Another organic compound $\mathrm{Y}$ with four carbon atoms reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds $\mathrm{X}$ and $\mathrm{Y}$ are heated together in the presence of a little of concentrated sulphuric acid, then a new compound $\mathrm{Z}$ is formed.

What is compound $\mathrm{X}$? Also write its formula.

A neutral organic compound with four carbon atoms $\mathrm{X}$ reacts with sodium metal to evolve a gas which burns with a ‘pop’ sound. Another organic compound $\mathrm{Y}$ with four carbon atoms reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds $\mathrm{X}$ and $\mathrm{Y}$ are heated together in the presence of a little of concentrated sulphuric acid, then a new compound $\mathrm{Z}$ is formed.

What is compound $\mathrm{Y}$? Also write its formula.

A neutral organic compound with four carbon atoms $\mathrm{X}$, reacts with sodium metal to evolve a gas which burns with a ‘pop’ sound. Another organic compound $\mathrm{Y}$, with four carbon atoms, reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds $\mathrm{X}$ and $\mathrm{Y}$ are heated together in the presence of a little concentrated sulphuric acid, then a new compound $\mathrm{Z}$ is formed.

What is compound $\mathrm{Z}$? Write its formula.

A neutral organic compound with four carbon atoms $\mathrm{X}$ reacts with sodium metal to evolve a gas which burns with a ‘pop’ sound. Another organic compound $\mathrm{Y}$ with four carbon atoms reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds $\mathrm{X}$ and $\mathrm{Y}$ are heated together in the presence of concentrated sulphuric acid, then a new compound $\mathrm{Z}$ is formed.

What type of smell is given by compound $\mathrm{Z}$?

A neutral organic compound with four carbon atoms $\mathrm{X}$, reacts with sodium metal to evolve a gas which burns with a ‘pop’ sound. Another organic compound $\mathrm{Y}$, with four carbon atoms, reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds $\mathrm{X}$ and $\mathrm{Y}$ are heated together in the presence of a little concentrated sulphuric acid, then a new compound $\mathrm{Z}$ is formed.

What is the general name of compounds like $\mathrm{Z}$?

A neutral organic compound with four carbon atoms $\mathrm{X}$, reacts with sodium metal to evolve a gas which burns with a ‘pop’ sound. Another organic compound $\mathrm{Y}$, with four carbon atoms, reacts with sodium hydrogen carbonate to evolve a gas which turns lime water milky. When compounds $\mathrm{X}$ and $\mathrm{Y}$ are heated together in the presence of a little concentrated sulphuric acid, then a new compound $\mathrm{Z}$ is formed.

What is the general name of the reaction which takes place between $\mathrm{X}$ and $\mathrm{Y}$ to form $\mathrm{Z}$?