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Question

The reaction of nitrogen with oxygen to form nitric oxide is :

A
Exothermic reaction
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B
Endothermic reaction
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C
Thermal balance reaction
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D
None of these
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Solution

The correct option is D Endothermic reaction
Oxygen and nitrogen do not react at ambient temperatures. But at high temperatures, they undergo an endothermic reaction producing various oxides of nitrogen. Such temperatures arise inside an internal combustion engine or a power station boiler, during the combustion of a mixture of air and fuel, and naturally in a lightning flash.

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