$XCl_2 \text{ (excess)} + YCl_2 \to XCl_4 + Y \downarrow ;$
$YO \xrightarrow[> 400^oC]{\Delta} \frac{1}{2} O_2 + Y$. The ore of $Y$ would be:

  • A
    Siderite
  • B
    Cinnabar
  • C
    Malachite
  • D
    Hornsilver

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