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प्रश्न
Which of the following makes the ore porous and more reactive?
विकल्प
Calcination
Roasting
Both calcination and roasting
Neither calcination nor roasting
MCQ
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उत्तर
Both calcination and roasting
Explanation:
Both calcination and roasting involve heating the ore to high temperatures. This drives out volatile impurities and moisture, leaving behind a highly porous and chemically reactive metal oxide.
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