Question

Nitrogen gas is absorbed by:
A. Aluminium carbide
B. Calcium carbide
C. Ferrous sulphate
D. Calcium hydroxide

Answer 1

Absorption: Absorption is a condition in which one thing becomes part of another thing. For example: when water falls on flour then we mop it with mop clothes. The water will absorb with the mop cloth. This is an example of daily life.

Complete step by step answer:
Absorption: Absorption is a condition in which one thing becomes part of another thing. The molecules which are being absorbed, are known as absorbate and the molecules around which absorbate are being absorbed, are known as absorbent.
Adsorption: Adsorption is the process of the attachment of liquid or gas particles to the surface solid particles. The molecules which are being adsorbed, are known as adsorbate and the molecules around which adsorbate are being adsorbed, are known as adsorbent. Adsorption is an exothermic process (i.e. heat will evolve during the reaction).
There are two types of adsorption:
Physical adsorption and chemical adsorption
Physical adsorption: In physical adsorption molecules are adsorbed by Vander wall force.
Chemical adsorption: In chemical adsorption adsorbate and adsorbent are combined together by adsorbate-adsorbent forces.
Absorption processes can be increased by increasing the concentration of reactants. If there is more free space between the atoms then there will be more absorption. Absorption is an endothermic reaction (i.e. which has to provide energy for the absorption process). Absorption is a bulk phenomenon (i.e. absorbed material will uniformly distribute throughout the adsorbent).
Nitrogen is generally absorbed by many compounds like plants, water, and zeolites.
Zeolites: Zeolites are aluminosilicates minerals. They act as adsorbents as well as catalysts.
Catalyst: The substance which is added in a reaction to increase the rate of reaction. They do not take part in a reaction but they enhance the rate of reaction (either increase the rate of reaction or decrease the rate of reaction).
From the given options nitrogen gas is absorbed by calcium hydroxide only.

So, the correct answer is Option D.

Note:
Calcium carbide is a chemical compound also known as calcium acetylide. Its chemical formula is $Ca{C_2}$. It is generally used for the production of acetylene in the industries. Calcium carbide reacts with water then it forms calcium hydroxide and acetylene.