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 10
A student heats a sample of potassium chlorate and collects a gas that relights a glowing splint. Name the gas and write the balanced equation for the reaction.
A white solid turns yellow on heating and returns to white on cooling. Name the compound and the type of reaction.
Calculate the number of moles of oxygen gas produced when 0.5 moles of potassium chlorate decompose completely. (2KClO3 → 2KCl + 3O2)
Explain why decomposition reactions are important in the environment.
Explain why decomposition reactions are usually endothermic.
Explain why silver chloride is stored in dark bottles.
Name the products formed when ferrous sulphate is heated strongly.
Name the type of decomposition reaction that occurs when silver bromide is exposed to sunlight.
State one use of the decomposition reaction of silver bromide in daily life.
What is the main difference between a decomposition reaction and a combination reaction?
What type of decomposition reaction is used in the extraction of metals from their molten salts?
Write the balanced chemical equation for the decomposition of ammonium dichromate.
Write the balanced chemical equation for the thermal decomposition of lead(II) nitrate.
Write the balanced equation for the photolytic decomposition of silver chloride.
