Question

Compound (A) is used as a/an:
$Ca + {C_2} \to Ca{C_2}\xrightarrow{{{N_2}}}A$
(A) Fertilizer
(B) Dehydrating agent
(C) Oxidising agent
(D) Reducing agent

Answer 1

Hint : The unknown compound is made from natural resources. It is mainly made up of potassium, nitrogen, phosphate also zinc and other metals. Conditions such as high pressure and temperature are required to create this compound.

Complete Step By Step Answer:
The question belongs to the concept of characteristics of p block elements, as we can see in the given question nitrogen (which is a p-block element) gas is passed to get the end product.
Now let us see what will be the product formed when nitrogen is passed through calcium carbide which is formed due to the reaction between calcium and diatomic carbon.
When calcium reacts with diatomic carbon the product is calcium carbide or calcium acetylide. It is tetragonal in structure and is mainly used in the production of acetylene and calcium cyanamide( $CaC{N_2}$ ).
After that when dinitrogen or nitrogen gas is passed through calcium carbide at high temperature, it results in the formation of calcium cyanamide. It is used as a fertilizer because when it comes in contact with water, it decomposes to calcium carbonate along with ammonia gas. Ammonia is essential for plants as nitrogen promotes growth of plants and is also essential for photosynthesis process for conversion of sunlight into chemical energy.
Hence, we can conclude that when calcium carbide reacts with nitrogen gas (dinitrogen) it results in the formation of calcium cyanamide and it is used as a fertilizer.
So option A is the correct answer.

Note :
In the above question remember that calcium carbide will only react with nitrogen gas or dinitrogen for the formation of calcium cyanamide when the temperature is high. Also don’t get confused between the products formed.