Question

Each of the following statement is true, only under some specific conditions. Write the condition the each subquestion in not more than two sentences. 

(i) Metals can be recovered from their ores by chemical methods 

(ii) High purity metals can be obtained by zone refining method.

Answer 1

(i) Because they occur as oxides, carbonates, sulphides which can be calcined or roasted. 

(ii) Metals like Ge can be readily melted and can easily crystallise out from the melt form.