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

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An Intiative by Sri Chaitanya

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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