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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

54 mins15 questions

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Covalent Bonding & Coordinate (Dative 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

Choose your answer

21 mark

Which of the following contains a dative covalent bond?

  • N2

  • NH3

  • CN-

  • NH4+

Choose your answer

31 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

11 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

21 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

    31 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

      41 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

      11 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

      21 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

      31 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