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Anomalous properties of nitrogen - class-XII

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Multiple Choice

Which of the following statements is wrong?

  1. Single N-N bond is stronger than the single P-P bond.
  2. $PH _{3}$ can act as a ligand in the formation of coordination compound with transition elements.
  3. $NO _{2}$ is paramagnetic in nature.
  4. Covalency of nitrogen in $N _{2}O _{5}$ is four.
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