State whether the following statements are true (T) or false (F).

A.

The efficiency of protective colloid can be determined with the help of Hardy-Schulze rule.

B.

Colloidal solutions show high value of osmotic pressure.

C.

Low molecular mass impurities in a colloidal solution are removed by dialysis.

D.

The phenomenon of adsorption had been used for creating partial vacuum.

E.

Al₂(SO₄)₃ is less effective than MgSO₄ in coagulating As₂S₃ sol.