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Nitrogen(IV) oxide is prepared by heating lead(ll) nitrate.

  1. Write an equation for the reaction.
  2. At room temperature, nitrogen(IV) oxide exists as an equilibrium mixture with dinitrogen tetraoxide.
       Δ is-ve
      (brown)          (pale yellow)
    State the observation made when the mixture is placed in an ice-bath. Give a reason. 

1 Answer

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  1. 2Pb(NO3)2(s)2PbO(s) + 4NO2(g) + O2(g)
  2. Mixture turns yellow. yellow colour intensifies
    Decrease in temperature,forward is favoured /more N2O4 is formed since the reaction is exothermic
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