Draw the structures of ${\mathrm{BCl}}_3.{\mathrm{NH}}_3$ and ${\mathrm{AlCl}}_3$ (dimer).

Explain why the following compound behaves as Lewis acid?

${\mathrm{BCl}}_3$

Explain why the following compound behaves as Lewis acid?

${\mathrm{AlCl}}_3$

Give reason for the following:

${\mathrm{CCl}}_4$ is immiscible in water, whereas ${\mathrm{SiCl}}_4$ is easily hydrolysed.

Give reason for the following:

Carbon has a strong tendency for catenation compared to silicon.

Explain the following :

Aluminium forms $[{\mathrm{AlF}}_6{]}^{3–}$ ion but boron does not form $[{\mathrm{BF}}_6{]}^{3–}$ ion.

Explain the following :

Electron gain enthalpy of chlorine is more negative as compared to fluorine.

Explain the following :

Carbon shows catenation property but lead does not.