Embibe Experts Solutions for Chapter: p-Block Elements (Boron & Carbon Family), Exercise 1: EXERCISE

What happens when: (write only chemical reactions)

(a) iodine is treated with ${\mathrm{SnCl}}_2$.

(b) carbon dioxide is passed through a concentrated aqueous solution of sodium chloride saturated with ammonia.

(c) red lead is treated with nitric acid.

(d) dilute nitric acid is slowly reacted with tin.

${\mathrm{BCl}}_3$ in aqueous solution exists as ${\mathrm{B}}^{3+}$ and ${\mathrm{Cl}}^{-}$.

Pure crystalline boron is very unreactive, and it is attacked only at a high temperature by strong oxidising agents such as a mixture of hot concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ and ${\mathrm{HNO}}_3$.

${\mathrm{AlX}}_3(\mathrm{X}=\mathrm{Cl}, \mathrm{Br})$ exists as dimer and retains dimer formula in non-polar solvents like ether, benzene etc.

${\mathrm{Be}}_2\mathrm{C}$ is called acetylide because it reacts with water yielding ethyne.

${\mathrm{Pb}}_3{\mathrm{O}}_4$, a double oxide, is obtained by heating lead $\left(\mathrm{II}\right)$ oxide in air.

Write the chemical equations to represent the following reactions.

(a) The oxidation of $\mathrm{HCl}\left(\mathrm{aq}\right)$ to ${\mathrm{Cl}}_2\left(\mathrm{g}\right)$ by ${\mathrm{PbO}}_2$.

(b) The disproportionation of $\mathrm{SnO}$ to $\mathrm{Sn}$ and ${\mathrm{SnO}}_2$.

What will happen if we take $\mathrm{Si}\left({\mathrm{CH}}_3\right){\mathrm{Cl}}_3$ as a starting material for the preparation of commercial silicon polymer?