Question

Which of the following is not an example of heterogeneous catalytic process?
A. Ostwald’s process
B. Haber’s process
C. Combustion of coal
D. Hydrogenation of vegetable oils.

Answer 1

Hint: Heterogeneous catalysis are generally chemical catalysis whose physical phase is different from the physical state of the reactant and product which takes part in the catalyzed chemical reaction. These types of catalysis reactions are extremely useful because they produce several commercial important products.

Complete answer:
The Ostwald process describes the conversion of ammonia into nitric acid through the process of oxidation and in this reaction vanadium pentoxide is used as a catalyst.
Haber’s process describes how atmospheric nitrogen gets converted to ammonia by reacting with hydrogen gas. In this type of reaction iron catalyst is used.
Combustion of coal is the process in which coal gets burned and converted into ashes and in this process no catalyst is required.
Hydrogenation of vegetable oils is the process of combining fat with hydrogen to increase its saturation behavior and this process occurs at very high pressure in the presence of catalyst nickel.
Hence by discussing all the four options we can conclude that the processes which take place with the help of catalysts are known as heterogeneous catalytic processes and those in which catalysts have no role are not kept in the category of heterogeneous catalytic processes.

Thus option C is the correct answer.

Note:
Catalyst is defined as a substance which does not take part in the reaction but used to increase the rate of reaction. Like if any reaction takes place in a week then with the help of a catalyst we can do it in very less time.