Multiple choice

Which of the following pair of metals, is extracted by the reduction with Al thermite process?

  1. Mn and Cr

  2. Au and Ag

  3. Fe and Co

  4. Ni and Sn

  5. Hg and Ni

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A Correct answer
Explanation

Mn and Cr metals are extracted by the reduction with Al thermite process. The reduction potentials of Mn and Cr are - 1.08 V and - 0.74 V, which favours the reduction by Al thermite process.