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Q.

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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a

Both I and II

b

Both II and III

c

Both I and III

d

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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