MPSC Rajyaseva 2019 GS Paper 1 — Question 15
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कल्सिनेशन प्रक्रियेतून ________ बाहर पडतो. During calcination process
1)फक्त कार्बनडायऑक्साईड बाहेर पडतो
2)फक्त हैड्रोजनमधून पाणी बाहेर पडते
3)(1) किंवा (2) हे धातूकां वर अवलंबुन असते✓ Correct
4)हायड्रोजन सल्फाईड बाहेर पडतो
During calcination, ores are heated strongly below their melting point in the absence of air. Depending on the ore type, it can release carbon dioxide (from carbonates) or water (from hydrated oxides).