Question

For the reaction 2NO₂ + F₂ ¾® 2NO₂F,

following mechanism has been provided:

NO₂ + F₂$\overset{\quad slow\quad}{\rightarrow}$NO₂F + F

NO₂ + F $\overset{\quad fast\quad}{\rightarrow}$NO₂F

Thus rate expression of the above reaction can be written as -

• A. r = K [NO₂]² [F₂]
• B. r = K [NO₂]
• C. r = K [NO₂] [F₂]
• D. r = K [F₂]

Answer 1

Answer: (C)

r = K $NO₂$ $F₂$

Answer 2

By slow step ; r = K × [NO₂] [F₂]