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Question

Alumino-thermic process is used for the extraction of metals whose oxides are :

A
Fusible
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B
Not easily reduced by carbon
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C
Not easily reduced by hydrogen
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D
Strongly basic
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Solution

The correct option is B Not easily reduced by carbon
Alumino thermite process: Certain Oxides of Mn, Cr do not reduce by carbon due to very high melting point. They are reduced by Al.

Examples:
Cr2O3+2Al2Cr+Al2O3
3Mn3O4+8Al9Mn+4Al2O3

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