Which of the following is not correct regarding calcination? (a) Impurities are removed in the f...

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Which of the following is not correct regarding calcination?
(a) Impurities are removed in the form of elemental vapour.
(b) Carbonates are converted into oxides.
(c) Temperature of the mixture is maintained below the melting point of the mixture.
(d) Lower oxidation state are oxidised further.
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