which of the following is true?
Answer : D. All ores are minerals
Sulphide ores are concentrated by
Answer : A. Froth floatation
The ore of manganese is
Answer : D. Pyrolusite
Metal ore, galena contains
Answer : C. lead
Which metal does not form amalgam?
Answer : A. Fe
Match List I correctly with List II and select your answer using the codes given below:
Answer : A. a-2 ,b-1,c-4 ,d-3