Thomas slag is used in

  • A
    Road making and as a building material
  • B
    As a solvent
  • C
    As an activator
  • D
    As a catalyst in contact process

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Which of the following are the by-products $NOT$ obtained in the extraction of copper?

Flux is used to remove ...... .

What is the percentage $(\%)$ of silver in German silver?

Match the conversions in Column-$I$ with the type$(s)$ of reaction$(s)$ given in Column-$II$.
Column-$I$ Column-$II$
$A$. $PbS \rightarrow PbO$ $p$. roasting
$B$. $CaCO_3 \rightarrow CaO$ $q$. calcination
$C$. $ZnS \rightarrow Zn$ $r$. Carbon reduction
$D$. $Cu_2S \rightarrow Cu$ $s$. self reduction

Which of the following is not a basic flux?

Difficult
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