Chemical Reactions and Equations

CBSE Class 10 · Science · 31 past questions

9 of 31 · show all

1. Q1 2026

   The gases evolved on heating lead (II) nitrate crystals are…

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2. Q2 2026

   Which of the following is an example of a displacement reaction ?

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3. Q3 2026

   In the following equation…

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4. Q4 2026

   2 g of green coloured crystals of ferrous sulphate are heated in a dry boiling tube. Name the type of…

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5. Q5 2026

   When ferrous sulphate crystals are heated in a test tube, we observe that…

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6. Q6 2026

   A student notices that her silver jewellery turned dull and had a grey-black coating over it after wearing…

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7. Q7 Sample paper 2026-27

   Chameleons contain crystals that reflect light and produce colour. Adjusting the spacing between these…

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8. Q8 Sample paper 2026-27

   A food label is given below. E304 and E307b are added to the flavoured biscuits.… (with a figure)

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9. Q9 Sample paper 2026-27

   Attempt either option A or B.…

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