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MPSC State Service 2019 · GS · Question 15 of 97

During calcination process

Chemistry

  1. AOnly CO2 is given out
  2. BOnly H2O from hydrates is given out
  3. C(1) or (2) depending on type of oreCorrect
  4. DH2S given out

Answer: C. (1) or (2) depending on type of ore

Explanation

Calcination drives off CO₂ from carbonate ores or H₂O from hydrated ores, depending on the ore type.

Source: MPSC Rajyaseva Prelims 2019 – GS Paper I (Set A), official paper

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