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Question
Extraction of moderately reactive elements is done by _______ and _______ method.
Options
roasting and calcination
roasting and reduction
separation and calcination
none of these
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Solution
Extraction of moderately reactive elements is done by roasting and calcination method.
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\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
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