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NEET levelSingle correct optionDifficulty 1 of 3ev006

In the cylinders of an automobile engine, nitric oxide is formed by the reaction of

A $N X_{2}$ and $H X_{2}$ at high pressure
B $N X_{2}$ and $O X_{2}$ at high temperature
C $NH X_{3}$ and $O X_{2}$ at room temperature
D $NO X_{2}$ and $CO$ at room temperature

Answer: B

The high temperature of the combustion chamber makes atmospheric nitrogen react with oxygen:

N X_{2} + O X_{2} 2 NO

. This is the main source of nitrogen oxides in vehicle exhaust.

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