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AP EAMCET202123 Aug 2021Evening ShiftChemistryChemical KineticsActual

For a reaction NO ₂+ CO CO ₂+ NO the possible elementary steps (below 500 ~K ) are Step 1: NO ₂+ NO ₂ Slow NO + NO ₃ Step 2: NO ₃+ CO Fast CO ₂+ NO ₂ It's rate expression will be

Options

  1. Arate =k [ NO ₂ ][ CO ]
  2. Brate =k [ CO ₂ ][ NO ]
  3. Crate =k [ NO ₂ ]^2
  4. Drate =k[ NO ] [ NO ₃ ]

Correct answer

C. rate =k [ NO ₂ ]^2

Step-by-step solution

For a reaction aligned & m X+n Y Z & rate =k[X]^m[Y]^n aligned Rate of reaction is the slower step of the reaction. NO ₂+ NO ₂ Slow NO + NO ₃ Rate =k [ NO ₂ ]^2 .

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