WHAT HAPPENS WHEN ?

 Complete the following reactions by supplying the products and the reagents.

Tert-Butyl bromide is treated with sodium metal in dry ether.

Benzyl bromide is treated with hydrogen in presence of $\mathrm{Pd}-\mathrm{C}$.

$1-$Butanol is heated with concentrated sulphuric acid at $443 \mathrm{K}$.

Propene is treated with ${\mathrm{BrCCl}}_3$ in presence of peroxides.

But$-1-$yne and but$-2-$yne are treated with dil.${\mathrm{H}}_2{\mathrm{SO}}_4$ in presence of ${\mathrm{HgSO}}_4$, at $330 \mathrm{K}$.

Acetylene is treated with dilute hydrochloric acid in presence of ${\mathrm{HgCl}}_2$.

Styrene $({\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CH}={\mathrm{CH}}_2)$ is treated with $\mathrm{HBr}$ in presence of peroxides.