An unsaturated hydrocarbon having the molecular formula ${\mathrm{C}}_5{\mathrm{H}}_8$ gives two molecules one of formaldehyde and one molecule of 2-oxopropanal on ozonolysis. Write the structure of the hydrocarbon.

Complete the following reactions.

${\mathrm{CH}}_2={\mathrm{CH}}_2 \underset{{\mathrm{KMnO}}_4}{\overset{\mathrm{Acidic} }{\to }}$ 

Complete the following reactions.

${\mathrm{CH}}_2={\mathrm{CH}}_2 \underset{{\mathrm{KMnO}}_4}{\overset{\mathrm{dil}. \mathrm{Alkaline} }{\to }}$ 

Complete the following reactions.

$\mathrm{Propene} + {\mathrm{Br}}_2 \to$ 

Complete the following reactions.

$\mathrm{Propene} + \mathrm{HCl} \stackrel{\mathrm{Peroxide}}{\to }$ 

Complete the following reactions.

$\mathrm{Propene} + \mathrm{HBr} \stackrel{\mathrm{Peroxide}}{\to }$ 

Complete the following reactions.

$\mathrm{Propene} + \mathrm{HI} \stackrel{\mathrm{Peroxide}}{\to }$ 

Complete the following reactions.

$\mathrm{Ethylene} + {\mathrm{H}}_2{\mathrm{SO}}_4 \to$