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How many metals are commercially extracted by hydrometallurgy from the given metals?
( Ag, Mn, In, Cr, Pb, Au )

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Solution

Two metals (Cu and Au) are commercially extracted by hydrometallurgy. In this process, the more electropositive metal can displace less electropositive metal from their salts.

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Q. How many metals are commercially extracted by pyrometallurgy from the given metals?
( Cu, Fe, Sn, Au, K, Na )

Q. How many metals are commercially reduced by Goldschmidt alumino-thermic process from the given metals?
Na, Pb, AI, Mn, Cr, Sn

F e_{2} O_{3}, S n O_{2}, P b S, M g C l_{2}, H g S, Z n S, A l_{2} O_{3}, A g_{2} S, C u_{2} S

Consider given ores and calculate the value of expression

(\frac{Q + R}{P \times S})

, where,
P = Number of ores from which the metal is commercially extracted by Hydrometallurgy.
Q = Number of ores from which the metal is commercially extracted by Self-reduction.
R = Number of ores from which the metal is commercially extracted by carbon reduction.
S = Number of ores from which metal is commercially extracted by electrolyitc reduction.

Q. How many metals are commercially extracted by electrometallurgy from the given metals?
( AI, Mg, Na, K, Ag, Hg, Ti, Th, Zr, B )

How many of the following metals are extracted by self reduction process?
$P b, A u, M g, S n, F e, A l, A g, H g, N a, Z n, C u, C a$

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