Question

Which of the following statements is (are) correct?

विकल्प

• Levigation is generally used for the extraction of oxide ores.

• Haematite is usually concentrated by froth floatation process.

• Ethyl xanthate used in froth floatation process acts as a frothing agent.

• Leaching is a chemical method.

Answer 1

Levigation is generally used for the extraction of oxide ores and leaching is a chemical method.

Explanation:

Levigation is described as a process used for concentrating oxide ores based on differences in specific gravity (heavier ore particles remain while lighter impurities wash away). Haematite is concentrated by magnetic separation (ore particles attracted by magnet). Froth floatation is mainly for sulphide ores, with ethyl xanthate acting as a collector, not a frothing agent. Leaching is identified as a chemical method.