Exercise 2

Consider the following compounds:
$\mathrm{I}. \mathrm{HCHO}$ $\mathrm{II}. {\mathrm{CH}}_3\mathrm{CHO}$ $\mathrm{III}. {\mathrm{CH}}_3{\mathrm{COCH}}_3$
What is the order of reactivity of these compounds?

A mixture of benzaldehyde and formaldehyde on heating with aqueous $\mathrm{NaOH}$ solution gives

Which is not true about acetophenone?

An organic compound, ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ does not give a precipitate with $2, 4$-dinitrophenylhydrazine reagent and does not react with metallic sodium. It could be:

The most reactive compound towards the formation of cyanohydrin, on treatment with $\mathrm{KCN}$, followed by acidification is:

 
Here, $\mathrm{X}$ is.

Compound $\text{'}\mathrm{A}\text{'}$ (molecular formula ${\mathrm{C}}_3{\mathrm{H}}_8\mathrm{O}$) is treated with acidified potassium dichromate to form a product $\text{'}\mathrm{B}\text{'}$ (molecular formula ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$). $\text{'}\mathrm{B}\text{'}$ forms a shining silver mirror on warming with ammoniacal silver nitrate. $\text{'}\mathrm{B}\text{'}$, when treated with an aqueous solution of ${\mathrm{H}}_2{\mathrm{NCONHNH}}_2\mathrm{HCl}$ and sodium acetate, gives a product $\text{'}\mathrm{C}\text{'}$. Identify the structure of $\text{'}\mathrm{C}\text{'}$.

An organic compound $\text{'}\mathrm{A}\text{'}$ has a molecular formula ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}.$ It undergoes the iodoform test. When saturated with $\mathrm{HCl}$, it gives $\text{'}\mathrm{B}\text{'}$ of molecular formula ${\mathrm{C}}_9{\mathrm{H}}_{14}\mathrm{O}. \text{'}\mathrm{A}\text{'}$ and $\text{'}\mathrm{B}\text{'}$, respectively are