Define the following terms:

(i) Homogenous catalysis

(ii) Coagulation

(iii) Macromolecular colloids

(i) Homogenous catalysis

When the reactants and the catalysis take part in a single chemical reaction which occurs in one phase throughout the reaction, is called as a homogenous reaction or for this case due to use of catalyst it is called homogenous catalysis.

Enzyme catalysis in human body is an example of homogenous catalysis where blood is the transmission medium. These kinds of reactions have tremendous importance in pharmaceutical industries where changes in phases of the reactants affect the desired properties of the products.

(ii) Coagulation

Coagulation is a form of homo-philicity where the suspended particles in a solution comes together to form heavier agglomerates of the same substance. This process is greatly used for separation of suspended particles that are inseparable with the help of mechanical or other forms of physical processes.

The component to be separated is given a form of seeding (by adding the same solid substance) that begins the agglomeration of suspended solids to give you a coagulated molecules which are larger in size that then can be separated easily by filtration.

(iii) Macromolecular colloids

When the size of the particles in the solution is somewhat close to the colloidal range i.e. 1 nanometer(10^-9) to 1 micrometer(10^-3), the solution is called macromolecular colloid. These are most stable forms of colloid as the particles blend in with the atmospheric solution and common examples are starch, cellulose being the natural macromolecular colloids and polymers like PVC, nylon, etc as synthetic colloids.