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UPSC Civil Services (Mains)

Chemistry optional

  • 2 papers
  • 250 marks each
  • 3 h per paper
  • 5 of 8 questions, Q1 and Q5 compulsory

Paper I covers physical and inorganic chemistry.

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Choosing three questions in the first ten minutes

Two questions are fixed. The other three decide whether you finish the paper, so the choice deserves the first ten minutes.

  1. Read all six optional questions before picking any.
  2. Mark each part as sure, partial or blank.
  3. Count marks, not parts. A question with a blank 20-mark part is a 30-mark question.
  4. Check the section rule: at least one from Section A and one from Section B.
  5. Between two equal questions, pick the one with a derivation or numerical you can finish.

Write the order of attempt on the question paper before you start, and keep to it.