Draw the Lewis dot structure of the following:

Borax

Draw the Lewis dot structure of following:

${\mathrm{Al}}_2{\mathrm{Cl}}_6$

Draw the Lewis dot structure of the following:

${\mathrm{C}}_3{\mathrm{O}}_2$

Correct dipole moment order is

Arrange the following compounds in decreasing order of their dipole moment

${\mathrm{CH}}_3-\underset{\mathrm{I}}{{\mathrm{CH}}_2}-{\mathrm{NO}}_2$, ${\mathrm{CH}}_3-\underset{\mathrm{II}}{{\mathrm{CH}}_2}-{\mathrm{NH}}_2$, ${\mathrm{CH}}_3-\underset{\mathrm{III}}{{\mathrm{CH}}_2}-\mathrm{F}$, ${\mathrm{CH}}_3-\underset{\mathrm{IV}}{{\mathrm{CH}}_2}-\mathrm{C}\equiv \mathrm{N}$