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CBSE Class 10 Science 2018 — Paper 31/3

80 marks · 3 hours · 27 questions (33 with the OR choices)

All 33 of its questions also appear in 31/1 or 31/2.

Take this paper as a timed mock

Free with an account: the board's time limit, marking at the end, and the answer to every question.

Questions 1–2 · 1 mark each

  1. Q1 1 mark

    Also in 31/1 (Q1), 31/2 (Q2)

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  2. Q2 1 mark

    Also in 31/1 (Q2), 31/2 (Q1)

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Questions 3–5 · 2 marks each

  1. Q3 2 marks

    Also in 31/1 (Q5), 31/2 (Q4)

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  2. Q4 2 marks

    Also in 31/1 (Q3), 31/2 (Q5)

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  3. Q5 2 marks

    Also in 31/1 (Q4), 31/2 (Q3)

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Questions 6–15 · 3 marks each

  1. Q6(a) 3 marks

    Also in 31/1 (Q12(a)), 31/2 (Q8(a))

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    OR
    Q6(b) 3 marks

    Also in 31/1 (Q12(b)), 31/2 (Q8(b))

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  2. Q7(a) 3 marks

    Also in 31/1 (Q11(a)), 31/2 (Q6(a))

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    OR
    Q7(b) 3 marks

    Also in 31/1 (Q11(b)), 31/2 (Q6(b))

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  3. Q8 3 marks

    Also in 31/1 (Q9), 31/2 (Q9)

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  4. Q9 3 marks

    Also in 31/1 (Q10), 31/2 (Q7)

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  5. Q10 3 marks

    Also in 31/1 (Q13), 31/2 (Q15)

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  6. Q11 3 marks

    Also in 31/1 (Q15), 31/2 (Q13)

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  7. Q12 3 marks

    Also in 31/1 (Q14), 31/2 (Q14)

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  8. Q13 3 marks

    Also in 31/1 (Q8), 31/2 (Q11)

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  9. Q14(a) 3 marks

    Also in 31/1 (Q7(a)), 31/2 (Q10(a))

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    OR
    Q14(b) 3 marks

    Also in 31/1 (Q7(b)), 31/2 (Q10(b))

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  10. Q15 3 marks

    Also in 31/1 (Q6), 31/2 (Q12)

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Questions 16–21 · 5 marks each

  1. Q16(a) 5 marks

    Also in 31/1 (Q20(a)), 31/2 (Q21(a))

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    OR
    Q16(b) 5 marks

    Also in 31/1 (Q20(b)), 31/2 (Q21(b))

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  2. Q17(a) 5 marks

    Also in 31/1 (Q18(a)), 31/2 (Q19(a))

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    OR
    Q17(b) 5 marks

    Also in 31/1 (Q18(b)), 31/2 (Q19(b))

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  3. Q18 5 marks

    Also in 31/1 (Q19), 31/2 (Q17)

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  4. Q19 5 marks

    Also in 31/1 (Q21), 31/2 (Q16)

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  5. Q20 5 marks

    Also in 31/1 (Q16), 31/2 (Q18)

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  6. Q21 5 marks

    Also in 31/1 (Q17), 31/2 (Q20)

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Questions 22–27 · 2 marks each

  1. Q22 2 marks

    Also in 31/1 (Q24), 31/2 (Q27)

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  2. Q23 2 marks

    Also in 31/1 (Q26), 31/2 (Q23)

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  3. Q24 2 marks

    Also in 31/1 (Q27), 31/2 (Q26)

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  4. Q25 2 marks

    Also in 31/1 (Q23), 31/2 (Q25)

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  5. Q26(a) 2 marks

    Also in 31/1 (Q25(a)), 31/2 (Q22(a))

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    OR
    Q26(b) 2 marks

    Also in 31/1 (Q25(b)), 31/2 (Q22(b))

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  6. Q27 2 marks

    Also in 31/1 (Q22), 31/2 (Q24)

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