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99 Percentile Qs Bank for JEE MainChemistryp Block Elements (Group 15, 16, 17 & 18)

Select the incorrect statement.

Options

  1. AOstwald's method of preparation of nitric acid is based upon catalytic oxidation of NH 3 by O 2 .
  2. BHNO 2 acts as both oxidant and reductant.
  3. CNO 2 reacts with ozone to form N 2 O 5 .
  4. DMixture of CaC 2 and Ca 3 N 2 can be used to give signals to submarine.

Correct answer

D. Mixture of CaC 2 and Ca 3 N 2 can be used to give signals to submarine.

Step-by-step solution

⇒ In Ostwald method, ammonia and oxygen are added to a tube that contains the metal catalyst (platinum). ⇒ Oxidation state of N   in HNO 2 = + 3 , Therefore it can accept electron to go to lower oxidation state (till - 3 ) , and it can also donate electron to get higher oxidation state ( + 5 ) , hence it can act as both oxidizing as well as reducing agent. ⇒ 2 NO 2 + O 3 → N 2 O 5 + O 2                   + 4          

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