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AP EAMCET202021 Sep 2020Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Conc. ( HNO ₃ ) turns brown on standing due to formation of

Options

  1. ANO
  2. B( NO ₂ )
  3. C( N ₂ O )
  4. D( N ₂ O ₄ )

Correct answer

B. ( NO ₂ )

Step-by-step solution

The decomposition of ( HNO ₃ ) is represented by the equation. (4 HNO ₃ 2 H ₂ O +4 NO ₂+ O ₂ ) Due to the formation of nitrogen dioxide, it turns yellow brown. Hence, option (b) is correct.

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