An aerosol is a

Give examples of $O/W$ (oil-in-water) and $W/O$ (water-in-oil) emulsions.

When a few drops of dilute $HCl$ are added to a freshly prepared precipitate of ferric hydroxide,a reddish-brown colloidal solution is obtained. This phenomenon is known as .......

Jelly is a form of

$A$ negatively charged suspension of clay in water will need for precipitation the minimum amount of

The impurities present in rain water possess $.....$ charge.