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AP EAMCET202125 Aug 2021Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

The gases liberated when zinc reacts with dilute and conc. HNO ₃ respectively are

Options

  1. ANO , NO ₂
  2. BNO , N ₂ O
  3. CN ₂ O , NO
  4. DN ₂ O , NO ₂

Correct answer

D. N ₂ O , NO ₂

Step-by-step solution

When zinc reacts with dilute HNO ₃ , it will produce nitrous oxide gas. At room temperature, it is a colourless, non-flammable gas, with a pleasant, slightly sweet odor. aligned & 4 Zn + Warm dilute 10 HNO ₃ Zinc nitrate 4 Zn ( NO ₃ )₂ &+ NH ₄ NO ₃+3 H ₂ O aligned 4 Zn + Cold dilute 10 HNO ₃ Zinc nitrate 4 Zn ( NO ₃ )₂ + Nitrous oxide N ₂ O +5 H ₂ O Similarly, when zinc repcts with concentrated HNO ₃ , it will produce nitrogen dioxide gas ( NO ₂ ) . It is used as the indicator for the larger group of nitrogen oxide

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