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ICSE Class 9 Chemistry Question 9 of 24

Model Question Paper — 2 — Question 20

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20
Question

Question 2(e)

(i) Give a balanced chemical equation for each of the following:

  1. Reaction with one reactant forming three products.
  2. Reaction with two reactants forming two products.
  3. Reaction with two reactants forming three products.

(ii) Give a balanced chemical equation for the following word equation:

Potassium dichromate reacts with sulphuric acid and sulphur dioxide to form potassium sulphate, chromium (III) sulphate and water.

Answer

(i) Balanced chemical equation :

  1. 2Pb(NO3)2 → Δ \xrightarrow{\space \Delta \space} 2PbO + 4NO2 + O2

  2. C2H5Br + NaOH ⟶ C2H5OH + NaBr

  3. 6CO2 + 12H2O ⟶ C6H12O6 + 6H2O + 6O2

(ii) K2Cr2O7 + H2SO4 + 3SO2 ⟶ K2SO4 + Cr2(SO4)3 + H2O