Which of the following are correct processes?

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Fe+Al2O3â¶2Al+Fe2O3

ZnO + C â Zn+ CO

Cr2O3+2Alâ¶2Cr+Al2O3

2Ag(CN)2Î+Znâ¶2Ag+Zn(CN)42â

answer is 铤.

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Detailed Solution

Al metal cant be liberated in the alumino thermite process, but it can react with oxides of Cr, Mn, Fe and release them.

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