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Overview of General Metallurgical Processes

Process in wh...

Question

Process in which the extraction of metals from ores is called:

A

metallurgy

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B

mining

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C

refining

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D

none of these

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Solution

The correct option is A metallurgy
The process containing the extraction or refining of metals is known as metallurgy.

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The process in which metals are extracted from their ores by heating them beyond the melting point is called

Q. ___ is the process of extraction of metals from their ores.

Reduction to free metal: some of the methods commonly used to get free metal from the concentrates ore are below.

Smelting: The process of extracting a metal in the state of fusions is called smelting. In this process, the ore is mixed with carbon and heated in a suitable furnace

Electrolytic reduction process: This process is used in the extraction of the alkali and alkaline earth metals, zinc and aluminium.

Self-reduction process: The sulphide ores of less electropositive metals like Hg, Pb, Cu etc., are heated in the air so as to convert part of the ore into oxide or sulphate which then reacts with the remaining sulphide ore to give the metal.

In the metallurgical extraction of zinc from ZnO, the reducing agent used is :

From which of the following ores, metals cannot be extracted using calcination process?

Q. Which of the following processes are widely used in the extraction of moderately reactive metals from their sulphide ore?

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