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Quarter 4 Module 3 - Chemical Reactions Around Us

Quiz by Keith Angeline Alejandro

Grade 10
Science
Philippines Curriculum: Grades K-10 (MELC)

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10 questions
Show answers
  • Q1

    Which type of chemical reaction is involved once you turned on the gas stove?

    Combustion Reaction

    Decomposition Reaction

    Single Replacement Reaction

    Combination Reaction

    120s
  • Q2

    Which is NOT TRUE about the Law of Conservation of mass?

    The number of atoms before and after the reaction is equal.

    The total mass of the product of the reaction is less than the reactants.

    Mass is neither created nor destroyed in a chemical reaction.

    The product of the reaction is different from the reactants but, the mass is still the same.

    120s
  • Q3

    How can we say that a chemical reaction took place between reactants?

    If a new product was formed.

    If there is a change in color, state, odor, and taste, or bubbles evolve.

    If the reactants’ number of atoms remains the same.

    If a new product was formed and there is a change in color, state, odor, and taste, or if bubbles evolve.

    120s
  • Q4

    What is the type of chemical reaction in H2O (l) + MgO (s) → Mg(OH)2 (s)

    Decomposition

    Combination

    Combustion

    Single Replacement

    120s
  • Q5

    What is the type of chemical reaction in 2NaCl (s) + F2 (g) → 2NaF (s) + Cl2 (g)

    Combustion

    Combination

    Double Replacement

    Single Replacement

    120s
  • Q6

    What is the type of chemical reaction in 2NaClO3 (s) → 2NaCl (s) + 3O2 (g)

    Decomposition

    Double Replacement

    Combustion

    Combination

    120s
  • Q7

    What is the type of chemical reaction in 3Ba (s) + Cr2O3 (s) → 3BaO (s) + 2Cr (s)

    Combination

    Single Replacement

    Combustion

    Double Replacement

    120s
  • Q8

    Which chemical equation is balanced?

    CH4 (g) + 2O2(g) → CO2 (g) + 2H2O (g)

    CH4 (g) + O2 (g) → CO2 (g) + H2O (g)

    2CH4 (g) + O2 (g) → 4CO2 (g) + 2H2O (g)

    CH4(g) + O2 (g) → 2CO2 (g) + H2O (g)

    300s
  • Q9

    Which chemical equation is balanced?

    CaCO3 (s) + HCl (aq) → 2CaCl2 (aq) + CO2 (g) + H2O (l)

    CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + CO2 (g) + H2O (l)

    CaCO3 (s) + HCl (aq) → CaCl2 (aq) + 2CO2 (g) + H2O (l)

    2CaCO3 (s) + HCl(aq) → CaCl2 (aq) + CO2 (g) + H2O (l)

    300s
  • Q10

    If I want to use a wire to hang my plants, which will last longer: an iron wire or a copper wire? Why?

    A copper wire because it is reactive to water and oxygen under normal condition.

    A copper wire because it will not react with water and oxygen under normal condition.

    An iron wire because it is less reactive to water and oxygen than copper.

    An iron wire because it is more reactive to water and oxygen than copper.

    120s

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