Which one of the following statements is false?
(Karnataka CET 2011... VIDEO
Which one of the following statements is false?
(Karnataka CET 2011)
(a) During roasting, moisture is removed from the ore
\( \mathrm{P} \)
(b) The ore is freed from almost all non-metallic impurities
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(c) Calcination of ore is carried out in the absence of any blast of air
(d) The concentrated zinc blende is subjected to calcination during its extraction by pyrometallurgy
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