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IBChemistry: HLDPExam Questions4. Chemical Bonding & Structure4.1 Ionic & Covalent Bonding

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First teaching 2014

Last exams 2024

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Ionic & Covalent Bonding (DP IB Chemistry: HL)

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4.1 Ionic & Covalent Bonding

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4.1 Ionic & Covalent Bonding

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11 mark

Phosphine, PH3, can react with a hydrogen ion, H+, to form the phosphonium ion.

Which type of bond is formed in this reaction?

  • dipole-dipole forces

  • dative covalent bond

  • ionic bond

  • hydrogen bond

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21 mark

Silver and iodine are both shiny crystalline solids.

Which forces exist between neighbouring iodine molecules in solid iodine and particles in solid silver?

 

iodine

silver

A

metallic bonds

covalent bonds

B

ionic bonds

metallic

C

covalent bonds

covalent bonds

D

London dispersion forces

metallic

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    31 mark

    Below are four solids. Which of these contains more than one kind of bonding?

    • diamond

    • sodium chloride 

    • iron 

    • ice

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    41 mark

    Which of the following statements about ions and ionic compounds are true? 

    1.   Nitrogen can form a 3- ion
    2.   Potassium can form a cation
    3.   The formula for aluminium chloride is AlCl2

    • I and II only

    • I and III only

    • II and III only 

    • I, II and III

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    51 mark

    What is the correct formula for ammonium carbonate?

    • NH3CO3

    • NH4CO3

    • (NH4)2CO3

    • (NH4)3CO3

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    61 mark

    In acidic conditions, ammonia, NH3, reacts with a proton, H+, to form ammonium NH4+.

    Using the following key:

     bold times   N electron

    cross times   H electron

    Which of the following Dot & Cross diagrams correctly illustrate electron movement in this reaction.

    q6_4-1_easy_mcq_ib-chemistry-sl

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      71 mark

      Which crystal structure does not conduct electricity when solid, has a high melting point and can conduct electricity when molten?

      • Giant metallic

      • Giant ionic

      • Macromolecular

      • Simple molecular

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      81 mark

      Which of these atoms is most electronegative?

      • Cl

      • Mg

      • Br

      • Na

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      91 mark

      Which of the following compounds is not bonded ionically?

      • CaCO3

      • CH3OH

      • NaOH

      • BaCl2

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      101 mark

      “Electrostatic attraction between cations and delocalised electrons”

      Which of the following types of bonds does the statement best describe?

      • hydrogen

      • ionic

      • dipole-dipole

      • metallic

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      111 mark

      Which of the following materials only contain one type of bonding?

      • graphite

      • brass

      • ice

      • iodine crystals

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      121 mark

      Based on their Pauling electronegativity values, which atom is more likely to form a covalent bond with fluorine?

       

      atom

      Pauling value

       

      fluorine

      4.0

      A

      hydrogen

      2.2

      B

      copper

      1.9

      C

      magnesium

      1.3

      D

      potassium

      0.8

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        11 mark

        Which of the following statements about 2-methylpropan-2-ol, CH3C(CH3)(OH)CH3, are correct ? 

        1. The structure contains 16 bonding pair of electrons
        2. The O-C-C bond angle is 109.5 o
        3. The total number of electrons is 32

        • I and II only 

        • I and III only 

        • II and III only 

        • I, II and III

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        21 mark

        Which of the following molecules has the biggest overall dipole?

        q2_4-1_medium_mcq_ib-chemistry-hl

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          31 mark

           The electronegativity of four elements are given below 

          N = 3.0       H = 2.1       F = 4.0      P = 2.1      

           What is the correct order of polarity for the following compounds

          • PH3 < PF3 < NF3 < NH3

          • PH3 < PF3 < NH3 < NF3   

          • NF3 < NH3 < PH3 < PF3 

          • PH3 < NH3 < NF3 < PF3 

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          41 mark

          Which of the following compounds has both covalent and ionic bonds?

          • calcium bromide, CaBr2

          • potassium carbonate, K2CO3

          • propanoic acid, CH3CH2COOH

          • dichloromethane, CH2Cl2

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          51 mark

          Which is the best description of ionic bonding?

          • electrostatic attraction between cations and electrons

          • electrostatic attraction between nuclei

          • electrostatic attraction between oppositely charged ions

          • electrostatic attraction of nuclei towards shared electrons in the bond between the nuclei

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          61 mark

          Below are four molecules. Which is the most polar molecule present?

          • CH3NH2

          • CH4

          • CCl4

          • CO2

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          71 mark

           Potassium bromide is an ionic compound. 

          When can potassium bromide conduct electricity?

           

          Solid

          Molten

          Aqueous

          A

          ✓

          ✓

          ⨯

          B

          ✓

          ⨯

          ✓

          C

          ⨯

          ✓

          ✓

          D

          ⨯

          ⨯

          ✓

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            81 mark

            A periodic table is needed to answer this question.

            Of the four compounds listed below which one has the greatest ionic character?

            • HCl

            • MgS

            • CO2

            • CaO

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            91 mark

            What is the correct formula for aluminium sulfate?

            • Al3(SO4)2

            • Al(SO4)2

            • Al2(SO4)3

            • AlSO4

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            101 mark

            Aluminium iodide, Al2I6 is a dimer and exists as a solid at room temperature. When it is a vapour it can exist as an AlI3 molecule. 

            How many valence electrons are in an aluminium iodide, AlI3, molecule?

            • 22

            • 24

            • 26

            • 28

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            11 mark

            CHCl3 and Br2 are both liquids at room temperature due to the existence of dipoles.

            What dipoles are involved within CHCl3 and Br2?

             

            CHCl3

            Br2

            A

            induced dipoles only

            induced dipoles only

            B

            induced dipoles only

            induced dipoles and permanent dipoles

            C

            induced dipoles and permanent dipoles

            induced dipoles and permanent dipoles

            D

            induced dipoles and permanent dipoles

            induced dipoles only

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              21 mark

              What are the correct formulas for the following ions? 

               

              Phosphate

              Ammonium

              Ethanoate

              Nitrite

              A

              PO43-

              NH4+

              CH3COO+

              NO3-

              B

              PO32-

              NH4-

              CH3COO-

              NO2-

              C

              PO43-

              NH4+

              CH3COO-

              NO2-

              D

              PO42-

              NH4+

              CH3CH2COO-

              NO3-

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                31 mark

                What is the correct structure of the chlorite ion, ClO2- ?q3-4-1_hard_mcq_ib-chemistry-sl

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                  41 mark

                  Which of the following statements about 2-chloropropene, CH2C(Cl)CH3 is not correct

                  • There are 3 lone pairs in the molecule

                  • There are 24 valence electrons in the molecule 

                  • The molecule does obey the octet rule

                  • The molecule does not obey the octet rule

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                  51 mark

                  Which of the following structures do not obey the octet rule?

                  1. BeCl2
                  2. BF3
                  3. H2O

                  • I and II only

                  • I and III only

                  • II and III only

                  • I, II and III

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                  61 mark

                  The periodic table may be needed to answer this question.

                  Which is the shortest bond length in the following gases?

                  • oxygen-oxygen in oxygen gas, O2

                  • carbon-carbon in ethyne gas, C2H2

                  • nitrogen-nitrogen in nitrogen gas, N2

                  • oxygen-oxygen in ozone gas, O3

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                  71 mark

                  Which statement best describes the intramolecular bonding in a carbonate ion, CO32-?

                  • Only London forces

                  • Electrostatic attraction between pairs of electrons and positively charged nuclei

                  • Permanent dipole permanent dipole forces

                  • Electrostatic attraction between separate carbonate ions

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                  81 mark

                  The number of electrons in the valence shell of elements X and Y are 5 and 7 respectively. What is the formula and type of compound formed from these elements?

                  • Covalent, XY3

                  • Ionic, XY3

                  • Covalent, X3Y

                  • Ionic, X3Y

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                  91 mark

                  The nitrate(V) ion, NO3-, is a polyatomic ion, bonded by covalent bonds.

                  Which of the following shows the correct displayed formula for the nitrate ion?

                  q9-4-1_hard_mcq_ib-chemistry-sl

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                    101 mark

                    In which series of compounds does covalent character increase when going from left to right?

                    • KI, KBr, KCl

                    • NaI, KI, RbI

                    • NaCl, MgCl2, AlCl3

                    • SO2, P4O10, SiO2

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