The reaction 2NO + Br2 2NOBr takes place through the mechanism given below: NO + Br2 NOBr2 (fast) NO — JEE Mains Chemistry Past Papers Chemistry Question
Question
The reaction 2NO + Br2 2NOBr takes place through the mechanism given below: NO + Br2 NOBr2 (fast) NOBr2 + NO 2NOBr (slow) The overall order of the reaction is _________.
Answer: .
💡 Solution & Explanation
2NO + Br2 2NOBr (i) NO + Br2 NOBr2 Fast (ii) NOBr2 + NO Slow K 2NOBr r = k3 [NOBr2] [NO] Keq = 2 k k = 2 [NOBr ] [NO][Br ] [NOBr2] = 2 k [NO][Br ] k r = 3 k k k [NO]2 [Br2] r = k [NO]2 [Br2] so net order of reaction = 2 + 1 = 3
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