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  1. Problems
  2. /Chemical Bonding

Chemical Bonding

Chemistry
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31 problems
Type:
1.
Hydrogen sulphide, hydrogen selenide and hydrogen telluride boil at 213 K, 232 K and 271 K; their… New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Hard
2.
A mixture of ortho-nitrophenol and para-nitrophenol is steam distilled. New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Medium
3.
Water boils at 373 K and hydrogen sulphide at 213 K, although an H₂S molecule is almost twice as… New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Easy
4.
Fluorine, F₂, has 18 electrons. Write its configuration and find its bond order. New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Hard
5.
The B₂ molecule has 10 electrons. Write its configuration, find its bond order, and find the number… New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Medium
6.
Arrange O₂, O₂⁺, O₂⁻ and O₂²⁻ in order of increasing bond length. Which of them are paramagnetic? New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Medium
7.
Nitrogen, N₂, has 10 bonding and 4 antibonding electrons. New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Medium
8.
Two helium atoms have four electrons between them. New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Easy
9.
The C₂ molecule, found in flames and in comets, has 12 electrons. New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Medium
10.
Two atoms of the second period come together, and each brings its 1s, 2s and three 2p orbitals. New
High School (11–12) · Molecular Orbitals and Hydrogen BondsStemPy LabStemPy Lab
Easy
11.
Phosphorus is 3s² 3p³. Explain how it forms five bonds in PCl₅ and name the hybridisation. New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Hard
12.
Ethene, CH₂=CH₂, is flat. What is the hybridisation of each carbon atom? New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
13.
In ethane, ethene and ethyne, the carbon atoms are sp³, sp² and sp. New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
14.
Hydrogen chloride, chlorine and nitrogen are all covalent. New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
15.
Count the sigma and pi bonds in propene, CH₂=CH-CH₃, and in propyne, HC≡C-CH₃. New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
16.
The bond enthalpy of hydrogen is 435.8 kJ mol⁻¹. New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Easy
17.
Chlorine has 7 outer electrons. Find the electron pairs and lone pairs on chlorine in ClF₃. New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Hard
18.
Predict the shapes of the ammonium ion NH₄⁺, the hydronium ion H₃O⁺ and the amide ion NH₂⁻. New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
19.
Xenon is a noble gas with 8 outer electrons, yet it forms XeF₂, XeF₄ and XeF₆. New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
20.
Silicon (4 outer electrons), phosphorus (5) and sulphur (6) each form a chloride: SiCl₄, PCl₃ and… New
High School (11–12) · Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Easy
21.
Chlorine monofluoride, ClF, has a dipole moment of 0.88 D and a bond length of 163 pm. New
High School (11–12) · Lewis Structures and Ionic Bonds, Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
22.
The carbonate ion, CO₃²⁻, has three canonical forms. New
High School (11–12) · Lewis Structures and Ionic Bonds, Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
23.
Carbon to carbon bonds have these lengths and bond enthalpies: single, 154 pm and 348 kJ/mol… New
High School (11–12) · Lewis Structures and Ionic Bonds, Shapes of Molecules and HybridisationStemPy LabStemPy Lab
Medium
24.
For lithium fluoride, in kJ/mol: sublimation of lithium +159, half the bond enthalpy of fluorine… New
High School (11–12) · Lewis Structures and Ionic BondsStemPy LabStemPy Lab
Easy
25.
Arrange MgO, CaO, NaF and KBr in order of decreasing lattice enthalpy. Give a reason for each step. New
High School (11–12) · Lewis Structures and Ionic BondsStemPy LabStemPy Lab
Medium
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