An ore when heated in air gives Sulphur dioxide. Name the process that would be used for its concentration.

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Solution

Sulphur dioxide $({SO}_{2})$ is formed as one of the products whenever a metal sulphide gets heated in the air.
Froth floatation process is a technique used for the concentration of sulphide ores. The technique involves the use of crushed or ground ore taken in a large tank and mixed with foaming agents like pine oil or detergent. The froth is formed after the agitation of the mixture with air, and it is then collected into a tank. The ore is then concentrated and removed from the gangue particles.
Therefore, the process used for the concentration of ore when heated in the air gives Sulphur dioxide is the froth floatation process.

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