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{:("Column - I","Column - II"),("(A) Bli...

`{:("Column - I","Column - II"),("(A) Blister copper","(i) Aluminium"),("(B) Blast furnace","(ii) "2Cu_(2)O+Cu_(2)S rarr 6Cu+SO_(2)),("(C) Reverberatory furnace","(iii) Iron"),("(D) Hall-Heroult process","(iv) "FeO+SiO_(2)rarr FeSiO_(3)),(,"(v) "2Cu_(2)S+3O_(2)rarr 2Cu_(2)O+2SO_(2)):}`

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`(A)-(ii),(B)-(iii),(C)-(iv),(D)-(i)`
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Heating a mixture of Cu_(2)O and Cu_(2)S gives -

When CaF_(2) is added to pure Al_(2)O_(3) in the extraction of aluminium by Hall and Heroult process -

Which of the following statements about the following reaction are wrong 2Cu_2O+Cu_(2)Sto6Cu+SO_(2)

Cu_(2)S is black and Cu_(2)O is red through Cu^(+) has no unpaired electrons and is colourless.

Identify the oxidant and reductant in the following reactions Cu_(2)S(s)+2Cu_(2)O(s)to6Cu(s)+SO_(2)(g)

Write the expression for the equilibrium constant, K_(c) for each of the following reactions: 2Cu(NO_(3))_(2)(s) hArr 2CuO(s)+4NO_(2)(g) +O_(2)(g)

Which of the following reactions are disproportionation reactions - (i) Cu^(+)rarr Cu^(2+)+Cu (ii) 3MnO_(4)^(2-)+4H^(+)rarr 2MnO_(4)^(-)+MnO_(2)+2H_(2)O (iii) 2KMnO_(4)rarr K_(2)MnO_(4)+MnO_(2) (iv) 2MnO_(4)^(-)+3Mn^(2+)+2H_(2)O rarr 5MnO_(2)+4H^(+)