The process of dialysis finds application in the purification of blood by artifical kidney.In this impure blood is introduced in the artificial kidney, apparatus, where the waste material (electrolyte) diffuses through the membrane. The membrane used in the dialyser is different from the membrane used in osmosis. these membrane allow the movement of ions through them.
Blood is a negatively charged sol. The haemogolobin particles carry a positive charge. Blood is slightly alkaline (pH 7.36-7.42). Acidic salts like alum and `FeCI_3` decrease the `pH` of the blood and the denaturation of globular proteins present in blood takes place. Due to denaturation, these globular proteins become fibrous which are insoluble and stop bleeding . Blood is lyophobic in nature.
which of the following statements is/are not true ?

Options

A. Blood is positively charged sol
B. soap solution contians ionic micelles as the colloidal particles
C. blood is purified by the process of dialysis
D. `Ca^(2+)` and `K^(+)` coagulation of blood if added in ecess

Answer

A