Question

In the chemical reaction $2{N_2} + 3{H_2} \rightleftarrows 2N{H_3}$ at equilibrium
(A) Equal volume of $\left( {{N_2}} \right)$ and $\left( {{H_2}} \right)$ are reacting
(B) Equal masses of $\left( {{N_2}} \right)$ and $\left( {{H_2}} \right)$ are reacting
(C) The reaction has stopped
(D) The same amount of ammonia is formed as is decomposed into $\left( {{N_2}} \right)$ and $\left( {{H_2}} \right)$.

Answer 1

In the atmosphere about $78\%$ nitrogen is present. Nitrogen is present in the atmosphere and is not available for plants. Nitrogen in the atmosphere is present in the form of a molecule made up of two nitrogen molecules joined together.

Complete step by step answer:
For the production of ammonia $\left( {N{H_3}} \right)$ the most common method used in the chemical industry is Haber process. In which nitrogen $\left( {{N_2}} \right)$ and hydrogen $\left( {{H_2}} \right)$ are taken from atmosphere and they react with each other to form ammonia $\left( {N{H_3}} \right)$. This reaction is an exothermic reaction in which heat is released in the surrounding. This reaction is catalysed by a catalyst. The catalyst increases the rate of reaction and the reaction takes less time to form ammonia $\left( {N{H_3}} \right)$. The catalysts used in the Haber process are molybdenum $\left( {Mo} \right)$, aluminium oxide, calcium oxide. Mainly used as a catalyst in the Haber process is iron $\left( {Fe} \right)$. The Haber process is-
$2{N_2} + 3{H_2} \rightleftarrows 2N{H_3}$
This reaction is a reversible reaction. It means reactants change to products and products also change into reactants, this type of reaction is known as reversible reaction.
When the rate of formation of product is equal to the rate of formation of reactant that this point is known equilibrium.
Hence option D is the correct option. The same amount of ammonia is formed as is decomposed into $\left( {{N_2}} \right)$ and $\left( {{H_2}} \right)$.

Note:
Ammonia $\left( {N{H_3}} \right)$ plays a very important role in agriculture because it is used as fertilizer and helps to increase the yield of crops in the field.
In cleaning agents ammonia is used as a cleaner.
The density of ammonia is $0.73Kg/{m^3}$
The melting point of ammonia is $- {77.73^o}C$ and the boiling point of ammonia is $- {33.34^O}C$.