1.

Statement 1: For extraction of copper, malachite is calcunited but chalcocite is roasted Statement 2: Both roasting and calisation conert all the ares into their oxides

Answer»

Both I and II are correct and II is correct explanation of I
Both in and II are correct and li is not correct explanation of l
is TRUE but ll is false
is false but II is true

Solution :Statement-I: Malachite `(CuCO_(3).Cu(OH)_(2))` has VOLATILE impurity. So it is calcinated. Where as chalcocite (sulphide ore of copper) is roasted.
Statement. IL : During roasting only sulphide ores are converted into oxides.


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