The coagulation value is expressed in the units of ..............

Identify the correct statements from the following:
$(i)$ $A$ closed vessel containing $90 \%$ $CO_2$ and $10 \%$ $O_2$ is an aerosol.
$(ii)$ Milk is an emulsion.
$(iii)$ Smoke is an aerosol.
$(iv)$ Peptisation is a method of purification of colloidal solution.
$(v)$ Ultrafiltration is a method of purification of colloidal solution.

Which principle is applicable in the purification of water using alum?

Identify the property of colloidal solutions where colloidal particles move freely towards respective electrodes under an applied electrical potential.

Which of the following has the lowest coagulation value for the coagulation of $As_2S_3$ colloidal solution?

Explain what is observed:
$(i)$ When a beam of light is passed through a colloidal sol.
$(ii)$ An electrolyte,$NaCl$,is added to hydrated ferric oxide sol.
$(iii)$ Electric current is passed through a colloidal sol.