General Principles and Processes of Isolation of Elements

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Question

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Question 1 : Concentration of sulphide ore is done by _______________
1. roasting
2. electrolysis
3. froth flotation process
4. None of these
Answer
8650

Question 2 : Malachite is an ore of ____________
1. zinc
2. iron
3. copper
4. gold
Answer
8651

Question 3 :

Formula of copper pyrite is

1. CuFeS
2. Cu₂S
3. Cu₂Fe₂S₂
4. CuFeS₂
Answer
8652

Question 4 :

Ore of aluminium is ____________

1. bauxite
2. dolomite
3. hematite
4. All of these
Answer
8653

Question 5 :

Removal of the unwanted materials like sand, clays, etc. from the ore is known as _________, _________ or ___________

1. separation, refining, gangue
2. washing, refining, amalgamation
3. concentration, dressing, benefaction
4. magnetic separation, purification, gangue
Answer
8654