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Match List-$I$ (substances) with List-$II$ (processes) employed in the manufacture of the substances and select the correct option.
List-$I$ (Substances) List-$II$ (Processes)
$A$. Sulphuric acid $i$. Haber's process
$B$. Steel $ii$. Bessemer's process
$C$. Sodium hydroxide $iii$. Leblanc process
$D$. Ammonia $iv$. Contact process

The process of the extraction of copper from copper pyrites involves:-
$(I)$ Froth floatation $(II)$ Calcination $(III)$ Roasting $(IV)$ Self reduction $(V)$ Smelting $(VI)$ Liquation $(VII)$ Electrorefining

Which of the following alloys contains $Sn$ metal?

Match List-$I$ with List-$II$ and select the correct answer using the codes given below the list.
List-$I$List-$II$
$1. Ti$$A. \text{Bauxite}$
$2. Si$$B. \text{Cerussite}$
$3. Al$$C. \text{Van-Arkel method}$
$4. Pb$$D. \text{Zone refining}$

Which of the following statements is correct?

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