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 Multiple Choice QuestionsMultiple Choice Questions

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221.

Gravity separation process is used for the concentration of:

  • calamine

  • haematite

  • chalcopyrite

  • bauxite


222.

Which of the following is not an ore of magnesium?

  • Magnesite

  • Dolomite

  • Gypsum

  • Carnallite


223.

In Mc Arthur forest method, silver is extracted from the solution of Na[Ag(CN)2] by the use of:

  • Fe

  • Mg

  • Cu

  • Zn


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