Question

In the reaction $4{NH}_3+5O_2⟶4NO+6H_{2}O$, when one mole of ammonia and one mole of oxygen are made to react to completion, then

• A. $1.0$ mole of $H_{2}O$ is produced
• B. All the oxygen is consumed
• C. $1.5$ mole of $NO$ is formed
• D. All the ammonia is consumed

Answer 1

Answer: (B)

All the oxygen is consumed

$4{NH}_3+5O_2⟶4NO+6H_{2}O$
$1{NH}_3+1.25O_2⟶1NO+1.5H_{2}O$
Hence $1$ mole of ${NH}_3$ reacts with $.125$ moles of $O_2$ to produce $1$ mole of $NO$ and $1.5$ moles of $H_{2}O$. Hence when one mole of ammonia and one mole of oxygen are made to react to completion, then all the oxygen are made to react to completion, then all the oxygen is consumed.