Decomposition Reactions
Chemistry ⇒ Chemical Reactions and Equations
Decomposition Reactions starts at 9 and continues till grade 12.
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See sample questions for grade 9
A student heats a sample of potassium chlorate (KClO3) and collects a gas. What is the gas likely to be?
A white solid turns yellow on heating and releases a brown gas. The reaction is: 2Pb(NO3)2 → 2PbO + 4NO2 + O2. What is the brown gas?
Calculate the number of moles of oxygen gas produced when 0.5 moles of potassium chlorate decompose according to the equation: 2KClO3 → 2KCl + 3O2.
Describe what happens when silver chloride is exposed to sunlight.
Explain the difference between thermal, electrolytic, and photodecomposition reactions.
Explain why decomposition reactions are generally endothermic.
Explain why decomposition reactions are important in nature.
Name the products formed when lead(II) nitrate is heated.
What are the products of the decomposition of sodium bicarbonate (NaHCO3) on heating?
What is the main difference between a decomposition reaction and a combination reaction?
What is the role of a catalyst in the decomposition of hydrogen peroxide?
Write the balanced chemical equation for the thermal decomposition of calcium carbonate.
Write the balanced equation for the decomposition of barium azide (Ba(N3)2).
Write the balanced equation for the electrolysis of water.
Write the products of the decomposition of ammonium dichromate (NH4)2Cr2O7.
