NEET Chemistry Chemical Kinetics Questions Solved


For the reaction 2NO2 + F2 → 2NO2F, following mechanism has been provided,

 NO2 + F2   slow  NO2F+F

NO2 + F   fast NO2F

Thus, rate expression of the above reaction can be written as:

(a) r = K[NO2]2[F2]

(b) r = K[NO2 ][F2]

(c) r = K[NO2]

(d) r = K[F2]

(b) Slowest step of mechanism decides the rate expression, thus, rate = K[NO2][F2]

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