A LevelChemistryCambridge (CIE)Exam Questions3. Chemical BondingCovalent Bonding & Coordinate (Dative Covalent) Bonding

Covalent Bonding & Coordinate (Dative Covalent) Bonding (Cambridge (CIE) A Level Chemistry): Exam Questions

Exam code: 9701

58 mins19 questions

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Covalent Bonding & Coordinate (Dative Covalent) Bonding

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1
1 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

Choose your answer

2
1 mark

Which of the following contains a dative covalent bond?

  • N2

  • NH3

  • CN-

  • NH4+

Choose your answer

3
1 mark

Which type of covalent bond is formed by the end-on overlap of atomic orbitals?

  • Sigma bond

  • Pi bond

  • Ionic bond

  • Metallic bond

Choose your answer

1
1 mark

N2 is a covalently bonded molecule that makes up 78% of gas in the air we breathe.

Which of the following is not present in an N2 molecule?

  • Two lone pairs of electrons

  • Three shared pairs of electrons

  • Three π bonds

  • 180° bond angle

Choose your answer

2
1 mark

Which diagrams correctly illustrate the formation of a σ bond and a π bond from the overlap of electron orbitals?

1-3-m-5

    Choose your answer

    3
    1 mark

    “The bond ....X…. between the hydrogen and halide in HBr is ….Y…. than in Hl.”

    Which pair of words does not correctly complete the sentence above.

     

    X 

    Y

    A

    Length

    Shorter

    B

    Energy

    Greater

    C

    Angle

    Smaller

    D

    Polarity

    Greater

      Choose your answer

      4
      1 mark

      Oxygen and nitrogen are consecutive elements in Period 2 and both form diatomic molecules.

      The bond length in the O2 bond is 1.21 A and the bond length in N2 is 1.09A. 

      What best explains the difference in bond length?

      • Oxygen atoms are more electronegative.

      • Nitrogen has more bonding electrons.

      • Nitrogen has a smaller atomic radius.

      • Oxygen bond is stronger.

      Choose your answer

      5
      1 mark

      Which pair of elements will form the most polar covalent bond?

      • C and N

      • Si and Cl

      • P and S

      • N and O

      Choose your answer

      6
      1 mark

      Which compound has the highest boiling point?

      • CH3CH2CH2CH3

      • (CH3)3CH

      • CH3CH2CH2OH

      • CH3CH2CHO

      Choose your answer

      7
      1 mark

      How many σ (sigma) and π (pi) bonds are present in a molecule of methyl cyanide (CH3​CN)?

      • 4σ, 1π

      • 5σ, 1π

      • 5σ, 2π

      • 6σ, 2π

      Choose your answer

      8
      1 mark

      Acrylonitrile (propenenitrile) is a vital monomer used in the production of synthetic fibers. Its structural formula is CH2=CHCN.

      How many σ (sigma) and π (pi) bonds are present in one molecule of acrylonitrile?

      sigma (σ) bonds

      pi (π) bonds

      A

      4

      2

      B

      6

      1

      C

      6

      3

      D

      7

      3

        Choose your answer

        1
        1 mark

        Which is the shortest bond length in the following gases?

        • Oxygen-oxygen in oxygen gas, O2

        • Nitrogen-nitrogen in nitrogen gas, N2

        • Carbon-carbon in ethyne gas, C2H2

        • Oxygen-oxygen in ozone gas, O3

        Choose your answer

        2
        1 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

        Choose your answer

        3
        1 mark

        The structure of the NO2 molecule is shown below. 

        screenshot-2024-03-28-121703

        In which compound is the hybridisation of the carbon atom the same as nitrogen atom in NO2?

        • Methane

        • Ethene

        • Ethyne

        • Propane

        Choose your answer