The p-Block Elements

The p-Block Elements

Question

The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:

  • NO2 and NO

  • NO and N2O

  • NO2 and N2O

  • N2O and NO2

Answer

D.

N2O and NO2

Zn + 4 HNO3 (conc.)→ Zn(NO3)2 + 2H2O + 2NO2
4Zn + 10HNO3 (dil) → 4Zn(NO3)2 + N2O + 5H2O

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