Question

Assertion :

$N_{2}O$ supports combustion more vigorously than air.

Reason:

Both nitrogen and oxygen contribute for combustion.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

Nitrous oxide ($N_{2}O$) (often referred to as just "nitrous") allows the engine to burn more fuel by providing more oxygen than air alone, resulting in a more powerful combustion. The gas itself is not flammable at a low pressure/temperature, but it delivers more oxygen than atmospheric air by breaking down at elevated temperatures. Nitrous oxide supports combustion by releasing the dipolar bonded oxygen radical.
Nitrogen is a component of air that does not support combustion is given by Rutherford in 1772.
Oxygen itself is not the fuel, but the oxidant. Fire hazards exist when concentrated oxidants and fuels are brought into close proximity; however, an ignition event, such as heat or a spark, is needed to trigger combustion.
Therefore assertion is correct but reason is not correct.
Thus Option C is correct.