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NEET UG CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
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In froth floatation process for the purification of ores, the particles of ore float because
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Correct option: A
Their surface is not easily wetted by water
Option A (Their surface is not easily wetted by water) is correct because the ore particles are coated with oil, making them hydrophobic and allowing them to float with the froth.
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Assertion (A): Wolframite impurities are separated from cassiterite by electromagnetic separation.
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Reason (R): Cassiterite being magnetic is attracted by the magnet and forms a separate heap. Which one is an ore of sodium? Aluminothermic process is used for the extraction of metals, whose oxides are: In the extraction of copper, the metal formed in the Bessemer’s converter is due to the reaction: