Out of $C u_{2} S, H g S$ and $Z n S$ , roasting is used to convert the minerals into metal in case of:

C u_{2} S, Z n S

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H g S, Z n S

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C u_{2} S

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H g S

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Solution

The correct option is D $H g S$
Mercury metal is produced from the cinnabar ( $H g S$ ) ore by roasting in air and condensing the vapour.

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Similar questions

For cell reaction, $Z n + C u^{2 +} \to Z n^{2 +} + C u,$ cell representation is

The cell representation of the given reaction is:
Zn(s) + Cu²⁺ → Zn²⁺ + Cu(s)

Z n (s) | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u (s) (E_{c e l l}^{\circ} = + 1.10 V)

298 K

Z n^{2 +}

C u^{2 +} (\frac{[Z n^{2 +}]}{[C u^{2 +}]})

E_{C e l l}^{o}

Z n (s) + C u^{2 +} (a q) \to Z n^{2 +} (a q) + C u (s)

E_{C u^{2 +} / C u}^{\circ} = 0.34 V, E_{Z n^{2 +} / Z n}^{\circ} = - 0.76 V

Z n + C u^{2 +} \to Z n^{2 +} + C u

M g + Z n^{2 +} \to M g^{2 +} + Z n

C u + 2 A g^{+} \to C u^{2 +} + 2 A g

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