Question

Blood is a colloidal solution of a _______ substance. The styptic action of ________ and ________ solution is due to ________ of blood forming a clot which stops further bleeding.
(A) (1) albuminoid (2) aluminium (3) ferrous chloride (4) peptization
(B) (1) albuminoid (2) alum (3) ferric chloride (4) coagulation
(C) (1) electrolytic (2) alum (3) ferrous chloride (4) circulation
(D) (1) negatively charged (2) chrome alum (3) sodium chloride (4) coagulation

Answer 1

Hint: A colloid is a phase separated mixture in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance. Sometimes the dispersed substance alone is called the colloid; the term colloidal suspension refers unambiguously to the overall mixture.

Complete step by step solution:
We know blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells. In vertebrates, it is composed of blood cells suspended in blood plasma.
But blood is also a colloidal solution,
Blood is a colloid because in blood the blood cell size is between 1nm to 100nm.
A mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also called a colloidal solution, colloidal system, or colloidal dispersion. The three forms in which all matter exists are solid, liquid or gas.
The process of settling of colloidal particles is called coagulation or precipitation of the sol.
The minimum concentration of an electrolyte in millimoles per litre required to cause precipitation of a sol in two hours 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.

Therefore, we can conclude that option (B) is correct.

Note: Blood clotting, or coagulation, is an important process that prevents excessive bleeding when a blood vessel is injured. Platelets (a type of blood cell) and proteins in your plasma (the liquid part of blood) work together to stop the bleeding by forming a clot over the injury.