Balanced Chemical Equations and Types of Reactions Quiz
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Questions and Answers

What is the chemical formula for marble?

  • H2O
  • Ca(OH)2
  • CaCO3 (correct)
  • CO2

    • Which of the following reactions is an example of an exothermic reaction?

  • Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)
  • 2H2(g) + O2(g) → 2H2O(l)
  • C(s) + O2(g) → CO2(g)
  • CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) (correct)

    • In the context of chemical reactions, what defines an exothermic reaction?

  • Formation of cold products
  • Release of heat during reaction (correct)
  • No change in temperature
  • Absorption of heat during reaction

    • What type of chemical reaction occurs when calcium hydroxide reacts with carbon dioxide?

    <p>Combination reaction</p> Signup and view all the answers

    Which substance is formed when coal burns in the presence of oxygen?

    <p>CO2</p> Signup and view all the answers

    What type of reaction is the burning of natural gas?

    <p>Combustion reaction</p> Signup and view all the answers

    During which process do we obtain energy from the food we eat?

    <p>Respiration</p> Signup and view all the answers

    Study Notes

    Chemical Reactions and Equations

    • A complete chemical equation represents the reactants, products, and their physical states symbolically.
    • A chemical equation must be balanced to ensure the same number of atoms of each type on both the reactant and product sides.

    Types of Chemical Reactions

    • Combination Reaction: Two or more substances combine to form a new single substance.
    • Decomposition Reaction: A single substance decomposes to give two or more substances.
    • Displacement Reaction: An element displaces another element from its compound.
    • Double Displacement Reaction: Two different atoms or groups of atoms (ions) are exchanged.
    • Precipitation Reaction: Produces insoluble salts.

    Oxidation and Reduction

    • Oxidation: Gain of oxygen or loss of hydrogen by substances.
    • Reduction: Loss of oxygen or gain of hydrogen by substances.

    Exothermic and Endothermic Reactions

    • Exothermic Reaction: Reactions where heat is given out along with the products.
    • Endothermic Reaction: Reactions where energy is absorbed.

    Examples of Chemical Reactions

    • Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water
    • Zinc + Silver nitrate → Zinc nitrate + Silver
    • Aluminium + Copper chloride → Aluminium chloride + Copper
    • Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride

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    Description

    Test your knowledge on balancing chemical equations and identifying types of reactions with this quiz. From predicting products to balancing equations, this quiz covers various chemical reactions scenarios.

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