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Extracting Metals in the Middle of Activity Series

Carbon can be...

Question

Carbon can be used to reduce aluminium ores.

A

True

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B

False

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Solution

The correct option is B False

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Similar questions

Q. Can we use carbon as the reducing agent for aluminium? Why ?

Q. Zinc oxide can be reduced to zinc by using carbon monoxide, but aluminium oxide cannot be reduced by a reducing agent. Explain why?

Q. How electrolysis can be used in extraction of aluminium? Why aluminium cannot be reduced by conventional reducing agents?

Q. Carbon reduction is not used to obtain certain metals from their ores because
1. Carbon cannot reduce certain oxides, sulphides, etc
2. It can react with the metals to form carbides
3. Temperatures required for the reduction are too high
4. It is expensive compared to the alternatives for some ores

Explain with reasons:

(a) In the electrolytic reduction of alumina, the graphite anode is gradually consumed.

or

Why the anode has to be replaced in this process?

(b) Roasting is carried out on sulphide ores and not on carbonate ores.

(c) Carbon can reduce lead oxide but not aluminium oxide.

(d) Electrolytic reduction is done to obtain aluminium?

(e) Why 'the food containing iron salts' should not be cooked in aluminium utensils?

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Extracting Metals in the Middle of Activity Series

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