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Questions and Answers
What type of reaction is represented by the chemical equation CaO(s) + H2O(l) → Ca(OH)2(aq) + Heat?
What type of reaction is represented by the chemical equation CaO(s) + H2O(l) → Ca(OH)2(aq) + Heat?
- Double displacement reaction
- Decomposition reaction
- Single displacement reaction
- Combination reaction (correct)
Which product is formed when calcium hydroxide reacts with carbon dioxide according to the chemical equation Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)?
Which product is formed when calcium hydroxide reacts with carbon dioxide according to the chemical equation Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)?
- Calcium oxide
- Carbon monoxide
- Carbonic acid
- Calcium carbonate (correct)
What is the main purpose of using slaked lime (calcium hydroxide) for whitewashing walls?
What is the main purpose of using slaked lime (calcium hydroxide) for whitewashing walls?
- To give a shiny finish to the walls (correct)
- To remove dirt and grime from the walls
- To create a chemical barrier on the walls
- To prevent moisture absorption by the walls
Which general type of reaction is represented by the burning of coal according to the chemical equation C(s) + O2(g) → CO2(g)?
Which general type of reaction is represented by the burning of coal according to the chemical equation C(s) + O2(g) → CO2(g)?
What is the purpose of balancing a chemical equation?
What is the purpose of balancing a chemical equation?
What does a 'skeletal chemical equation' for a reaction represent?
What does a 'skeletal chemical equation' for a reaction represent?
What is the law of conservation of mass as it applies to chemical reactions?
What is the law of conservation of mass as it applies to chemical reactions?
What does the burning of magnesium in air produce, as represented by equation (1.2)?
What does the burning of magnesium in air produce, as represented by equation (1.2)?
What is the result when dilute hydrochloric acid is added to iron fillings?
What is the result when dilute hydrochloric acid is added to iron fillings?
What is the purpose of balancing chemical equations?
What is the purpose of balancing chemical equations?
What is the balanced chemical equation for the reaction: Hydrogen gas combines with nitrogen to form ammonia?
What is the balanced chemical equation for the reaction: Hydrogen gas combines with nitrogen to form ammonia?
What is the balanced chemical equation for the reaction: Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate?
What is the balanced chemical equation for the reaction: Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate?
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