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Ellingham Diagram

Oxides of whi...

Question

Oxides of which of the following metals is reduced by aluminium powder?

A

Magnesium

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B

Potassium

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C

Chromium

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D

All of the above

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Solution

The correct option is D All of the above
All metal oxides loses oxygen and are therefore reduced. Metals always occur in their oxidized state in ores. In order to convert an ore to its elemental state, it is reduced.

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Q. The correct statements with respect to Ellingham's diagram among the following are
(I) Magnesium reduces aluminium oxide below 1700 K
(II) Aluminium reduces magnesium oxide above 1700 K
(III) Aluminium reduces magnesium oxide below 1700 K
(IV) Magnesium reduces aluminium oxide above 1700 K

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