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A certain reaction occurs in two steps as: (i) 2 SO 2 g + 2 NO 2 g → 2 SO 3 g + 2 NO g (ii) 2 NO g + O 2 g → 2 NO 2 g In the reaction,

Options

  1. ANO 2 g is intermediate
  2. BNO g is intermediate
  3. CNO g is catalyst
  4. DO 2 g is intermediate

Correct answer

B. NO g is intermediate

Step-by-step solution

It is a complex reaction because more then one steps are present. On adding equation ( 1 ) and ( 2 ) we get the overall reaction. 2 SO 2 + 2 NO 2 + O 2 → 2 SO 3 + 2 NO 2 In overall reaction NO is not present. Concept of intermediate is , it don't appear in overall reaction so NO is a intermediate in the reaction.

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