CBSE Class 12 Chemistry 2017 Delhi Set 1 Solved Paper

Question : 17 of 26

Marks: +1, -0

(a) Write the principle of method used for the refining of germanium.
(b) Out of

{\PbS}

and

{\PbCO}_3

(ores of lead), which one is concentrated by froth flotation process ?
(c) What is significance of leaching in the extraction of aluminium ?

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