Question

Blood is a colloidal solution of a_ _ (i) _ _ substances. The styptic action of _ _ (ii) _ _ and _ _ (iii) _ _ solution is due to _ _ (iv) _ _ of blood forming a clot which stops further bleeding.
(i) albumoid (ii) aluminum chloride (iii) ferrous chloride (iv) peptization
(i) albumoid (ii) alum (iii) ferric chloride (iv) coagulation
(i) electrolytic (ii) alum (iii) ferrous chloride (iv) circulation
(i) negatively charged (ii) chrome alum (iii) sodium chloride (iv) coagulation

Answer 1

Hint: or solving this question, we need to understand the concepts of colloids. We can define a colloidal solution as a type of a mixture that consists of particles whose size varies from 1 to 1000 nanometers.

Complete step by step answer:
As we know that, in a colloidal solution the particles are distributed evenly. So, the particles do not settle down in a colloidal solution.
The three basic properties of a colloid are:
A heterogeneous mixture
Size of colloid particles are too small to be seen by a naked eye.
It scatters light passing through them making its path visible.
According to the question, we know that the process of settling of the colloidal particles in a sol is known as coagulation or precipitation. Thus, the minimum concentration of an electrolyte is measured in millimoles per liter that is required to cause precipitation of a sol in two hours. Thus, this values is called coagulating value.
Blood is a colloidal solution of an albuminoid substance. The styptic action of alum and ferric chloride solution is due to coagulation of blood forming a clot which stops further bleeding (option B).

$\therefore $ Option B is correct answer.

Note:
In the case of milk, it is also a colloidal solution. As the particles of milk are a homogeneous mixture but it is undisturbed then the particles of milk remain unsettled i.e. heterogeneous this makes it a colloidal solution.