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Which of the following is disproportionation reaction?

Options

  1. AC H 4 + 2 O 2 → C O 2 + 2 H 2 O
  2. BC H 4 + 4 C l 2 → C C l 4 + 4 H C l
  3. C2 F 2 + 2 O H - → 2 F - + O F 2 + H 2 O
  4. D2 N O 2 + 2 O H - → N O 2 - + N O 3 - + H 2 O

Correct answer

D. 2 N O 2 + 2 O H - → N O 2 - + N O 3 - + H 2 O

Step-by-step solution

Reactions in which the same substance is oxidized as well as reduced are called disproportionation reaction. Writing the oxidation number of each element above its symbol in the given reactions. C + 4 H 4 + 1 + 2 O 2 0 → C + 4 O 2 - 2 + 2 H 2 + 1 O - 2 C - 4 H 4 + 1 + 4 C l 2 0 → C + 4 C l 4 + 4 H + 1 C − 1 l 2 F 2 0 + 2 O - 2 H - + 1 → 2 F - 1 + O + 2 F 2 - 1 + H 2 - 1 O - 2 2 N + 4 O 2 - 2 + 2 O - 2 H - + 1 → N + 3 O 2 - - 2 + N + 5 O 3 - - 2 + H 2 + 1 O - 2 Thus, in the reaction of N O 2 and O H - , N is

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