More than 1 option maybe correct:
Which of the foll is/are correct:
A)magnesite is the ore of Mg
B)ZnS and PbS can be separated in froth floatation by using NaCN as depressant.
C)White bauxite is purified by Hall's process
D)Zn can be extracted from ZnS by self reduction.
Ans given as A,B.
Have given C as well,doubt regarding option C.Plz clarify.
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2 Answers
1http://www.tutorvista.com/content/chemistry/chemistry-ii/metals/aluminum.php
1O yeah.so silly of me. Hall heroult's process is for reduction of Al and Bayer's process for it's leaching.
Thanks arshad.