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Overview of General Metallurgical Processes

Use of water ...

Question

Use of water to extract metal from ore is called hydrometallurgy.

A

True

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B

False

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Solution

The correct option is B
False

In the hydrometallurgy process, chemical agents or solvents are used to cause chemical changes in an ore. The obtained products are further processed to obtain the metal.

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Q. Assertion :Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by more electropositive metal. Reason: Copper is extracted by hydrometallurgy.

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 hydrometallurgy from the given metals?
( Ag, Mn, In, Cr, Pb, Au )

Q. STATEMENT-1: Extraction of zinc from sphalerite ore involves the roasting followed by reduction with coke.
STATEMENT-2 : Zinc can be commercially extracted by hydrometallurgy.

Q. ___________ is the metal extracted from the ore called galena.

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