Same chapter3 marksDifficulty: Medium
Name the constituents and one use of brass, bronze and duralumin.
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3 marksDifficulty: Medium
What is meant by the dressing of an ore? Name one method used.
Original Khojo Papers practice question — not from a past board paper.
Answer
Dressing is the removal of unwanted earthy and rocky impurities, the gangue, from the ore before extraction. Froth flotation is one method, used for sulphide ores: the powdered ore is agitated with oil and water, and the sulphide particles cling to the froth while the gangue sinks.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Hydrolytic washing and magnetic separation are other dressing methods.
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