Identify the correct statement from the following:

  • A
    Copper matte contains $Cu_2S$ and $FeS$
  • B
    Pig iron contains approximately $4 \%$ carbon
  • C
    The cracks formed in the blister copper are due to the release of $SO_2$ gas
  • D
    Van Arkel method is used for refining of nickel

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Which of the following reactions is $NOT$ entropy-driven with reference to extractive metallurgy? (unbalanced reactions)

Which of the following species is (are) desirable substance$(s)$ in the extraction of copper but not in the extraction of iron?

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Match the items under List-$I$ with the compounds/elements from the List-$II$. Select the correct answer from the sets $(a), (b), (c)$ and $(d)$.
List-$I$List-$II$
$(i)$ Explosive$(A)$ $NaN_3$
$(ii)$ Artificial gem$(B)$ $Fe_3O_4$
$(iii)$ Self reduction$(C)$ $Sn$
$(iv)$ Magnetic material$(D)$ $Al_2O_3$
$(E)$ $Pb(N_3)_2$
$(F)$ $Fe_2O_3$
$(G)$ $Cu$
$(H)$ $SiC$

Which alloy contains $Cu$ and $Zn$?

Thomas slag is used in

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