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DP IB Chemistry: SL

Topic Questions

Home / IB / Chemistry: SL / DP / Topic Questions / 4. Chemical Bonding & Structure / 4.3 Intermolecular Forces & Metallic Bonding / Structured Questions: Paper 2


4.3 Intermolecular Forces & Metallic Bonding

Question 1a

Marks: 2
a)
There are a number of different types of intermolecular force possible between molecules.
Which types of forces can be classified as 'van der Waals' forces?

[2]

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    Question 1b

    Marks: 2
    b)
    Methanol, CH3OH, is a small alcohol molecule that forms hydrogen bonds with water.
    Sketch 2 different hydrogen bonding interactions between methanol and water.

    [2]

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      Question 1c

      Marks: 4
      c)
      Methanol, CH3OH can be oxidised to methanal, CH2O and then to methanoic acid, HCOOH.

      Identify the strongest type of intermolecular force between:

      i)
      Methanal molecules

      ii)
      Methanoic acid molecules

      iii)
      Water and methanal

      iv)
      Water and methanoic acid
      [4]
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        Question 1d

        Marks: 3
        d)
        Methanoic acid reacts with sodium hydroxide to form sodium methanoate:

        HCOOH + NaOH rightwards arrowHCOONa + H2O

        Explain why sodium methanoate is a solid at room temperature and methanoic acid is a liquid.

        [3]

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          Question 2a

          Marks: 2
          a)
          Group 17 of the Periodic Table contain non-metals that are often referred to as the halogens.

          Iodine, I2, is one of these halogens. At room temperature and pressure it exists as a grey-black solid.

          Describe the bonding and forces present in I2 in the solid state.

          [2]

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            Question 2b

            Marks: 2

            b)

            The state of the halogens changes down the group, with fluorine being a gas and astatine being a solid.
            Explain why the melting point of the halogens increases down the group.

            [2]

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              Question 2c

              Marks: 3
              c)
              The halogens are all diatomic covalent molecules.
              Predict the most probable physical properties shown by all of the elements in Group 17.
              [3]
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                Question 2d

                Marks: 3
                d)
                The halogens can also form interhalogen compounds, such as iodine monochloride, ICl.
                Predict the state of iodine monochloride at room temperature and pressure, and explain your answer with reference to the intermolecular forces present.
                [3]
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                  Question 3a

                  Marks: 2
                  a)
                  Describe the bonding in solid sodium.

                  [2]

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                    Key Concepts
                    Metallic bonding

                    Question 3b

                    Marks: 2
                    b)
                    Potassium has a lower melting point than sodium does.
                    Explain why.

                    [2]

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                      Question 3c

                      Marks: 2
                      c)
                      Magnesium is in the same period as sodium, but has a much higher melting point.
                      Explain why.

                      [2]

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                        Question 3d

                        Marks: 2
                        d)
                        Predict whether magnesium is harder or softer than sodium and explain why.

                        [2]

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                          Question 4a

                          Marks: 2
                          a)
                          Copper is a common metal used in wiring.
                          Explain the electrical conductivity of copper.

                          [2]

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                            Key Concepts
                            Properties of metals

                            Question 4b

                            Marks: 2
                            b)
                            Explain why copper is also very malleable.
                            [2]
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                              Key Concepts
                              Properties of metals

                              Question 4c

                              Marks: 1
                              c)
                              Copper is used in alloys such as brass and bronze.
                              Outline why copper alloys are usually less malleable than pure copper.

                              [1]

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                                Key Concepts
                                Alloys

                                Question 4d

                                Marks: 2
                                d)
                                Copper is used for water pipes.
                                Suggest two properties of copper that make it suitable for this use, excluding malleability.

                                [2]

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                                  Key Concepts
                                  Properties of metals