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Concentration of Ore

Metals can be...

Question

Metals can be recovered from their ores by chemical methods.

A

True

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B

False

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Solution

The correct option is A True
Metals can be recovered from their ores by following chemical methods:
Calcination, Leaching, Roasting etc.

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Q. (i) Metals can be recovered from their ores by chemical methods.

(ii) High purity metals can be obtained by zone refining method.

Which one is true /false.

Q. Extraction of metals from their ores by chemical methods requires the use of reducing agent.

Q. Assertion :Extraction of metals from their ores by chemical methods requires the use of reducing agent. Reason: Reducing agent helps to convert the metal oxide from its ore to the metal.

Explain why can alkali and alkaline earth metals not be obtained by chemical reduction methods?

The methods for extracting metals from their ores are:

1. roasting a metal sulphide

2. chemical reduction of a metal oxide

3. electrolysis,

The preferred method depends on

E^{\circ}

value for the reducing half-reaction:

$M^{n +} (a q) + n e^{-} \to M (s)$

Which method is preferred for the metals with the most positive

E^{\circ}

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