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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Syllabus Edition
First teaching 2023
First exams 2025
|
Covalent Bonding & Coordinate (Dative Covalent) Bonding (CIE A Level Chemistry)
Topic Questions
21 mark
Which of the following contains a dative covalent bond?
N2
NH3
CN-
NH4+
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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
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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
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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
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31 mark
The structure of the NO2 molecule is shown below.
In which compound is the hybridisation of the carbon atom the same as nitrogen atom in NO2?
Methane
Ethene
Ethyne
Propane
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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
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21 mark
Which diagrams correctly illustrate the formation of a σ bond and a π bond from the overlap of electron orbitals?
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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 |
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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.
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