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in General Principle and Processes of Isolation of Elements by (33.4k points)
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1. The value of enthalpy of formation for Cr2O3 is -540 kJ/mol and that of Al2O3 is -827 kJ/mol. Is the reduction of Cr2O3 possible with Al?

2. Name the metallurgical refining techniques used for Ge and Ni.

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1. Yes. From the enthalpy of formation values of the concerned oxides it is clear that Al is a strong reducing agent than Cr.

2.

Element Metallurgical technique
Ge Zone refining
Ni Mond’s process

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