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What happens when
(i) potassium iodide solution is added to lead (II) nitrate solution ?
(ii) zinc is added to copper (II) chloride solution ?
(iii) hydrogen gas is passed over hot copper (II) oxide ?
Write balanced chemical equations of the reactions involved in support of your answer.
(i) potassium iodide solution is added to lead (II) nitrate solution ?
(ii) zinc is added to copper (II) chloride solution ?
(iii) hydrogen gas is passed over hot copper (II) oxide ?
Write balanced chemical equations of the reactions involved in support of your answer.
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(i) Yellow precipitate of potassium iodide is formed. (1/2)
ce{2KI + Pb(NO3)2->PbI2 + 2KNO3} (1/2)
(ii) Zinc will displace copper from copper chloride. (1/2)
ce{Zn + CuCl2 -> ZnCl2 + Cu} (1/2)
(iii) The black coating of copper oxide will turn brown. (1/2)
ce{CuO + H2 -> Cu + H2O} (1/2)
(Note: Award full marks if balanced chemical equation is written)
ce{2KI + Pb(NO3)2->PbI2 + 2KNO3} (1/2)
(ii) Zinc will displace copper from copper chloride. (1/2)
ce{Zn + CuCl2 -> ZnCl2 + Cu} (1/2)
(iii) The black coating of copper oxide will turn brown. (1/2)
ce{CuO + H2 -> Cu + H2O} (1/2)
(Note: Award full marks if balanced chemical equation is written)