Q34 / 150 · MHT CET 2020 (19 Oct Shift 2) · Chemistry

Which among the following sets of elements is present in chalcopyrite?

  • A
    $\mathrm{Fe}, \mathrm{S}$
  • B
    Al, O
  • C
    Al, Fe, 0
  • Correct answer
    D
    Cu, Fe, $S$

Solution

$\mathrm{Cu}, \mathrm{Fe}, \mathrm{S}$ $\mathrm{Cu}, \mathrm{Fe}$, and $\mathrm{S}$ are among the elements found in chalcopyrite. It's a copper iron sulphide mineral with a tetragonal crystal structure. $\mathrm{CuFeS}_{2}$ is the chemical formula for it. It is brassy to golden yellow in colour and has a Mohr hardness of $3.5$ to 4 . It has a distinctive green-tinged black stripe.

Hence, the correct answer is option: 'D'.

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