Observe the following chemical reactions...

Observe the following chemical reactions
i) `Fe_2O_3 + 2Al to 2Fe + Al_2O_3`
ii) `ZnO + C to Zn + CO`
iii) `Fe_2O_3 + 3C to 2Fe + CO`
iv) `Al_2O_3 + 3C to 2Al + 3CO`
Which of the above reaction is wrong? How is the metal present in the wrong equation extracted? Which of the above reaction can be used to join the broken parts of the machines. Why?

Text Solution

Verified by Experts

Wrong reaction is (iv) It is extracted by electrolysis (i) is used to join broken parts
`because` It is exothermic. Fe is in liquid state.

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