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
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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Which of the following contains a dative covalent bond?
N2
NH3
CN-
NH4+
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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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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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Which diagrams correctly illustrate the formation of a σ bond and a π bond from the overlap of electron orbitals?
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“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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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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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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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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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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