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Which one of the following oxides of nitrogen is known as ‘anhydride’ of nitric acid?

Options

  1. AN ₂ O
  2. BN ₂ O ₃
  3. CNO ₂
  4. DN ₂ O ₅

Correct answer

D. N ₂ O ₅

Step-by-step solution

Two oxides of nitrogen are acid anhydrides; that is, they react with water to form nitrogen-containing oxyacids. Dinitrogen trioxide is the anhydride of nitrous acid, HNO 2 , and dinitrogen pentoxide is the anhydride of nitric acid, HNO 3.

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