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NEST2019Chemistryp Block Elements (Group 15, 16, 17 & 18)

Nitrogen is known to form a variety of oxides and oxyacids. NO and N ₂ O are unstable, while NO ₂ is a stable oxide. NO ₂ is a brown acidic gas at room temperature and on cooling below 20^ C gives N ₂ O ₄ . NO ₂ / N ₂ O ₄ dissolves in water to give nitric acid. N ₂ O ₄ reacts with NO to form N ₂ O ₃ . When some metals react with dil. HNO ₃ at room temperature, oxides of nitrogen in lower oxidation states are formed.

Options

  1. AO - N - O bond angles in N ₂ O ₄ and N ₂ O ₃ are same.
  2. BNO ₂ dimerises to form N ₂ O ₄ due to redox reaction.
  3. CThe reaction of zinc with dil. HNO ₃ produces NO ₂ .
  4. DWhen N ₂ O ₃ dissolves in water, it gives nitrous acid.

Correct answer

D. When N ₂ O ₃ dissolves in water, it gives nitrous acid.

Step-by-step solution

No solution available.

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