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Chapter 6 Practice Paper: The Periodic Table — question paper

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QQ/S4CH/CH6

Secondary 4 · Chemistry (G2 / G3)

Chapter 6 Practice Paper

The Periodic Table

Duration: 40 minutes
Total: 30 marks
Name:
Class:
Register No.:
Date:

READ THESE INSTRUCTIONS FIRST

  • Write your name, class and register number in the spaces at the top of this page.
  • Answer all questions.
  • Give numerical answers correct to 3 significant figures unless stated otherwise, with units where a quantity is calculated.
  • Chemical equations should be balanced, with state symbols shown where the question asks for them.
  • The number of marks is given in brackets [ ] at the end of each question or part question.
  • The total number of marks for this paper is shown on its cover.

Original practice material written for the MOE Chemistry syllabus. It is not an official MOE or school examination paper. Chapter 6 (arrangement, Groups I, VII, VIII, transition elements).

For Examiner’s Use
Section A/ 10
Section B/ 20
Total/ 30

Section A: Multiple-choice questions[10 marks]

Choose the one correct answer for each question.

  1. 1

    The elements in Group II all have the same number of

    1. Aoccupied electron shells
    2. Bneutrons
    3. Cvalence electrons
    4. Dprotons
    ( )
  2. 2

    Which statement about the halogens is correct?

    1. Areactivity increases down the group
    2. Bthey are stored under oil
    3. Cbromine is a liquid at room temperature
    4. Dthey are monatomic
    ( )
  3. 3

    A small piece of lithium is dropped into water with universal indicator. You would observe

    1. Athe metal dissolving quietly with no gas
    2. Ba yellow flame immediately
    3. Ca white precipitate forming
    4. Dfizzing as the indicator turns purple
    ( )
  4. 4

    Halogen P displaces iodine from potassium iodide; halogen Q does not. Which conclusion follows?

    1. AQ is more reactive than P
    2. BP is above Q in Group VII
    3. CQ is above P in Group VII
    4. DP and Q are in the same group as Group I
    ( )
  5. 5

    Which set of properties belongs to the transition elements?

    1. Asoft, low melting point, colourless compounds
    2. Bhard, high melting point, coloured compounds, catalysts
    3. Cgases with full valence shells
    4. Ddiatomic molecules with seven valence electrons
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided. Include state symbols where the question asks, and balance every equation.

  1. 1

    Potassium is added to a trough of water with universal indicator added.

    1. (a)

      Write the equation for the reaction.

      [2]
    2. (b)

      State three observations.

      [3]
    3. (c)

      Predict whether rubidium (below potassium) reacts more or less violently. Explain.

      [1]
  2. 2

    Halogen displacement reactions are used to rank reactivity. A student mixes chlorine water with aqueous potassium iodide.

    1. (a)

      State the observation and write the ionic equation, with state symbols.

      [3]
    2. (b)

      Explain why the reverse mixing (iodine into KCl) gives no reaction.

      [2]
  3. 3

    An atom of element E carries 19 protons, and its electrons fill the shells as 2.8.8.1.

    1. (a)

      State the group and period of E, and its name if it has 19 protons.

      [3]
    2. (b)

      State the formula of the ion E forms and the type of compound its chloride would be.

      [1]
  4. 4

    Copper and sodium are both metals, yet they behave very differently.

    1. (a)

      State three ways copper (a transition metal) differs from sodium (Group I).

      [3]
    2. (b)

      State one property the two metals share.

      [2]

— End of paper —