Which method is used for the concentration of an ore based on the difference in density between the ore and impurities? MCQ with Answer and Explanation
Which method is used for the concentration of an ore based on the difference in density between the ore and impurities?
A. Magnetic separation
B. Froth flotation
C. Leaching
D. Hydraulic washing
Answer: Option D
Solution (By JKExamLibrary)
Hydraulic washing (or gravity separation) is based on the difference in specific gravities (densities) of the ore and the gangue (impurities). The powdered ore is washed with a stream of water; lighter impurities are washed away, leaving the heavier ore particles behind.
Explanation:
Sublimation is the direct transition from solid to gas phase. Examples: naphthalene, camphor, iodine, solid CO₂ (dry ice). Evaporation is liquid to gas; condensation is gas to liquid; distillation separates liquid mixtures based on boiling points.
Explanation:
In both electrolytic and galvanic cells, oxidation occurs at the anode (AN OX). The anode is positive in electrolytic cells, negative in galvanic. Reduction at cathode (RED CAT). Electroplating: object at cathode, dissolution at anode.
Explanation:
Lysozyme is an antibacterial enzyme found in tears, saliva, and egg white. It breaks down bacterial cell walls. Lipase digests fats, trypsin and pepsin digest proteins. Lysozyme is part of the innate immune system.
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