Answer: Option (d) is the correct answer.
Explanation:
When nitrogen gas chemically reacts with hydrogen gas then it results in the formation of ammonia gas.
The chemical reaction equation for this will be as follows.
[tex]N_{2} + H_{2} \rightarrow NH_{3}[/tex]
To balance this equation, we need to a multiply [tex]H_{2}[/tex] by 3 on reactant side, And, we also need to multiply [tex]NH_{3}[/tex] by 2.
Therefore, the equation which will correctly represent this reaction will be as follows.
[tex]N_{2} + 3H_{2} \rightarrow 2NH_{3}[/tex]