Decomposition Reactions
Chemistry ⇒ Chemical Reactions and Equations
Decomposition Reactions starts at 9 and continues till grade 12.
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Describe the importance of decomposition reactions in the environment.
Describe the role of a catalyst in the decomposition of hydrogen peroxide.
Explain the difference between thermal and photolytic decomposition reactions.
Explain why decomposition reactions are usually endothermic.
Explain why some decomposition reactions require light while others require heat.
State one industrial application of decomposition reactions.
State the products formed when ammonium nitrate is heated.
State the products formed when ferrous sulfate is heated strongly.
The decomposition of ammonium dichromate is used in which type of demonstration? (1) Volcano demonstration (2) Flame test (3) Titration (4) Electrolysis
Which of the following compounds decomposes upon heating to give a metal oxide and carbon dioxide? (1) NaCl (2) CaCO3 (3) KNO3 (4) H2SO4
Which of the following is a characteristic of decomposition reactions? (1) They always release energy (2) They involve the combination of two or more substances (3) They break down a single compound into two or more products (4) They always require a catalyst
Which of the following is a decomposition reaction? (1) 2H2 + O2 → 2H2O (2) 2NaCl → 2Na + Cl2 (3) NaOH + HCl → NaCl + H2O (4) CaO + CO2 → CaCO3
Complete the following reaction: 2HgO (s) → ________ + ________
Complete the following: 2AgBr (s) → ________ + ________ (on exposure to light)
Decomposition of hydrogen peroxide produces water and ________.
Decomposition reactions are generally ________ reactions, meaning they require energy input to proceed.
True or False: Decomposition reactions can be used to extract metals from their ores.
True or False: Electrolytic decomposition requires the presence of an electric current.
True or False: The decomposition of ammonium dichromate produces nitrogen gas, water vapor, and chromium(III) oxide.
True or False: The decomposition of calcium carbonate is an example of a thermal decomposition reaction.
