Which of the following statement (s) is/...

Which of the following statement (s) is/are correct ?

A

Magnesite is the ore of magnesium

B

A mineral containing ZnS and PbS togetheris separated in froth floatation process by adding NaCN as depressant

C

White bauxite is purified by Hall's process

D

Extraction of zinc from zinc blende is possible by self reduction

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The correct Answer is:

A, B

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