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UPSC PYQPrelims 2025

Civil Services Examination · Question 11

Statement I: Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions. Statement II: Silica-bearing clay is mixed with limestone while manufacturing cement. Statement III: Limestone is converted into lime during clinker production for cement manufacturing. Which one of the following is correct in respect of the above statements?

  1. Both Statement II and Statement III are correct and both of them explain Statement I
  2. Both Statement II and Statement III are correct but only one of them explains Statement I
  3. Only one of the Statements II and III is correct and that explains Statement I
  4. Neither Statement II nor Statement III is correct
Show answer & explanation

Answer: (B) Both Statement II and Statement III are correct but only one of them explains Statement I

Explanation

Both II and III describe true parts of the cement-making process, but only the calcination in III (releasing CO2 from limestone) explains the high emissions in I.