0%

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: 3
a)
Explain why methanol is soluble in water.

[3]

    Assess your score
      

    Question 1b

    Marks: 4
    b)
    Methanol, ethanol and propan-1-ol are all primary alcohols. Describe and explain the trend in their melting points shown below.
     
    Alcohol

    Methanol

    CH3OH

    Ethanol

    C2H5OH

    Propan-1-ol

    C3H7OH

    Melting point / oC -97 -114 -126

    [4]

      Assess your score
        

      Question 1c

      Marks: 4
      c)
      These longer primary alcohols have the following melting points:
       
      Alcohol C4H9OH C5H11OH C6H13OH C7H15OH C8H17OH C9H19OH C10H21OH
      Melting point / oC -90 -79 -52 -34 -16 -6 6

      Describe and explain this trend.

      [4]

        Assess your score
          

        Question 1d

        Marks: 2
        d)
        Predict, with a reason, whether ethanol or ethane-1,2-diol will have the higher melting point?

        [2]

          Assess your score
            

          Question 2a

          Marks: 6
          a)
          C2H6, C4H10 and C3H8 are alkanes.
          i)
          Put them in order of increasing boiling point and explain your answer.
          [3]
          ii)
          Put them in order of increasing volatility and explain your answer.

          [3]

            Assess your score
              

            Question 2b

            Marks: 5
            b)
            Predict, with a reason, whether the alkanes are soluble in water and propanone.

            [5]

              Assess your score
                

              Question 2c

              Marks: 5
              c)
              Pentane can exist as isomers, including pentane, CH3CH2CH2CH2CH3 and 2,2-dimethylpropane, CH3C(CH3)2CH3.

              i)
              Draw skeletal formula for each isomer shown above.
              [2]
              ii)
              Predict and explain which isomer of pentane would have the greater volatility.

              [3]

                Assess your score
                  

                Question 2d

                Marks: 5
                d)
                There are two isomers possible with the molecular formula C2H6O.

                i)
                Draw the skeletal formulae of both isomers

                [2]

                ii)
                Identify the strongest type of intermolecular force present in each isomer

                [2]

                iii)
                Predict which isomer would have the higher melting point

                [1]

                  Assess your score
                    

                  Question 3a

                  Marks: 2
                  a)
                  Explain why transition metals, such as iron, alloy best with other transition metals, such as nickel.

                  [2]

                    Assess your score
                      

                    Question 3b

                    Marks: 2
                    b)
                    State the name of the most common type of iron alloy and the element it is alloyed with.

                    [2]

                      Assess your score
                        
                      Key Concepts
                      Alloys

                      Question 3c

                      Marks: 3
                      c)
                      Describe and explain the trend in the melting points of all the Group 1 metals as you descend the group.
                      Use page 7 of the Data book.

                      [3]

                        Assess your score
                          

                        Question 3d

                        Marks: 3
                        d)
                        Describe and explain the trend in melting points across the Period 3 metals of sodium, magnesium and aluminium.
                        Use page 7 of the Data book.

                        [3]

                          Assess your score
                            

                          Question 4a

                          Marks: 2
                          a)
                          Explain why pure gold is not often used to make jewellery.

                          [2]

                            Assess your score
                              

                            Question 4b

                            Marks: 4
                            b)
                            Gold is often alloyed with other metals.

                            i)
                            Suggest why alloying gold is useful.

                            [2]

                            ii)
                            Give some examples of metals that are commonly alloyed with gold.

                            [2]

                              Assess your score
                                

                              Question 4c

                              Marks: 3
                              c)
                              Silver is the best metal electrical conductor.

                              i)
                              Explain how silver conducts electricity so well.

                              [2]

                              ii)
                              Explain why copper is often used instead of silver in wiring.

                              [1]

                                Assess your score
                                  
                                Key Concepts
                                Properties of metals