In roastingI. no metal impurities are removed.II. ore becomes porousIII. moisture is removed. Which of the above facts are true about roasting?

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Both I and II

Both II and III

Both I and III

I, II and III

answer is D.

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Detailed Solution

In roasting,(i) ore becomes porous.(ii) moisture is removed.(iii) no metal impurities are removed.

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