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Sec 1_Chemical Composition of Matter_Challenge!

Quiz by Tay Nian Zi

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6 questions
Show answers
  • Q1
    The properties of three substances, A, B and C, are observed during an experiment. I. Substances A, B and C are highly reactive towards water II. Substances A, B and C are able to conduct electricity. Which explanation best suits the relationship between substances A, B and C?
    A, B and C are metal and non-metal elements
    A, B and C are elements that belong in the same period in the Periodic Table
    A, B and C are not all non-metal elements
    A, B and C are elements that belong to the same group in the Periodic Table
    60s
  • Q2
    Florence has an unknown solid that is either a pure element or a pure compound. Which is the most appropriate method to determine the chemical composition of the solid?
    Crush and grind it
    Pass electricity through it
    Mix some acid with it
    Dissolve it in water and filter
    120s
  • Q3
    If two different substances can react with one another, the resultant products must be a compound.
    False
    True
    30s
  • Q4
    If a substance can be dissolved in water, then this substance must be a compound.
    False
    True
    30s
  • Q5
    When sugar is heated, decomposition occurs and carbon and water vapour are formed. Which of the following statements about decomposition is true?
    Elements combine to form compounds.
    Compounds are broken down into simpler substances.
    Elements are broken down into simpler substances.
    Compounds combine to form new compounds.
    30s
  • Q6
    Glucose is an example of a simple sugar. Carbon, hydrogen and oxygen can be found in the compound, glucose. Which of the following statements is true? I. The ratio of carbon, hydrogen and oxygen in glucose is always fixed. II. The ratio of carbon, hydrogen and oxygen in glucose depends on the size of the glucose compound. III. Glucose cannot be broken down into simpler substances by chemical methods. IV. Carbon, hydrogen and oxygen in glucose are elements.
    II and III only
    I and IV only
    II, III and IV only
    I only
    120s

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