Copper sulphate is prepared by blowing a current of air through copper scrap and dilute $H_2SO_4$. Dilute $HNO_3$ is also added:

  • A
    to oxidise copper to $Cu^{2+}$ which then forms $CuSO_4$ with dilute $H_2SO_4$
  • B
    to oxidise $Fe^{2+}$ to iron $(III)$ sulphate,which remains in solution after crystallisation of $CuSO_4$
  • C
    to speed up the ionisation of $H_2SO_4$ to give $SO_4^{2-}$ ions
  • D
    which combines with $H_2SO_4$ to give a very strong oxidising mixture and oxidises $Cu$ to $Cu^{2+}$

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Similar Questions

Match the following List-$I$ (Method) with List-$II$ (Metal refined):
List-$I$ (Method)List-$II$ (Metal refined)
$(A)$ Zone refining$(I)$ $Sn$
$(B)$ Liquation$(II)$ $In$
$(C)$ Vapour phase refining$(III)$ $Zn$
$(D)$ Distillation$(IV)$ $Zr$
-$(V)$ $Al$

The correct answer is:

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Which of the following pairs is correctly matched?

During the refining of copper,the methane gas produced acts as a reducing agent. What is its specific role?

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