Bonding

Which substance will not conduct an electric current?
1. CaO _(s)
2. C _(s) (graphite)
3. NaF _(l)
4. KI _(aq)
What is the bond angle in NO₃?
1. 120^o
2. 107^o
3. 109.5^o
4. 180^o
What are the correct formulas of magnesium nitride and aluminium sulfide?
1. Mg₂N₃ and Al₂S₃
2. Mg₃N₂ and Al₂S₃
3. Mg₂N₃ and Al₃S₂
4. Mg₃N₂ and Al₃S₂
When are ionic bonds most likely to form?
1. When a metal and a non metal react with each other.
2. When two elements with high electronegativity values react with each other.
3. When two metals of different groups react with each other.
4. When two non metallic elements react with each other.
The formula of tetrachloromethane is CCl₄.
How many lone pairs of electrons are in its dot cross structure?
1. 12
2. 4
3. 8
4. 12
Which compound contains both ionic and covalent bonds?
1. NH₄Cl
2. MgCl₂
3. HCl
4. H₂CO
What is the formula for an ionic compound formed between an element, X, from group 2 and an element, Y, from group 6?
1. XY
2. X₂Y
3. XY₂
4. X₂Y₂
What are valence electrons?
1. Electrons in the highest main energy level
2. Electrons in the energy level closest to the nucleus
3. The number of electrons required to complete the highest main energy level
4. The total number of electrons in the atom
What is the total number of electrons in p orbitals in an atom of iodine?
1. 23
2. 5
3. 7
4. 17
Which compound has the least covalent character?
1. NaCl
2. SiO₂
3. Na₂
4. MgCl₂
Which one of the following compounds dissolves in water to form a solution that does not conduct electricity?
1. CH₃CH₂OH
2. HCl
3. NaCl
4. CH₃COOH
What intermolecular forces are present in gaseous hydrogen?
1. Van der Waals’ forces
2. Hydrogen bonds
3. Covalent bonds
4. Dipole-dipole attractions
What happens when sodium and oxygen combine together?
1. Each sodium atom loses one electron.
2. Each sodium atom gains one electron.
3. Each oxygen atom gains one electron.
4. Each oxygen atom loses one electron.
In ethanol, C₂H₅OH_(l), there are covalent bonds, hydrogen bonds and van der Waals’ forces.
Which bonds or forces are broken when ethanol is vaporized?
1. Hydrogen bonds and Van der Waals’ forces
2. Only hydrogen bonds
3. Covalent bonds and hydrogen bonds
4. Covalent bonds and Van der Waals’ forces
Which one of the following statements is correct about multiple bonding between carbon atoms?
1. π bonds are weaker than sigma bonds.
2. Double bonds are formed by two π bonds.
3. Double bonds are weaker than single bonds.
4. π bonds are formed by overlap between s orbitals.
Which one of the statements about sigma and pi bonds is correct?
1. Sigma bonds are formed by either s or p orbitals, pi bonds are formed only by p orbitals.
2. Sigma bonds are formed only by s orbitals and pi bonds are formed only by p orbitals.
3. Sigma bonds are formed only by p orbitals and pi bonds are formed only by s orbitals.
4. Sigma and pi bonds are formed by either s or p orbitals.
Which one of the following molecules is linear?
1. CO₂
2. SO₂
3. H₂S
4. Cl₂O
Why is the boiling point of PH₃ lower than that of NH₃?
1. NH₃ is hydrogen bonded, while PH₃ is not hydrogen bonded.
2. PH₃ is non-polar, while NH₃ is polar.
3. The Van der Waals' forces are weaker in PH₃ than in NH₃.
4. The molar mass of PH₃ is greater than that of NH₃.
Which one of the following molecules is non-polar?
1. SO₃
2. NF₃
3. CHCl₃
4. H₂CO
Atoms of nitrogen and element X form a bond in which the electrons are shared equally.
Element X could be
1. chlorine
2. carbon
3. oxygen
4. phosphorous
Which is the correct description of polarity in F₂ and HF molecules?
1. Only one of the molecules is polar.
2. Both molecules contain a polar bond.
3. Neither molecule contains a polar bond.
4. Both molecules are polar.
Which of the following substances is made up of molecules containing polar covalent bonds?
1. Water
2. Calcium oxide
3. Chlorine
4. Sodium bromide
Which of the following pairs of elements combine to form an ionic compound?
1. Lead and fluorine
2. Sulphur and oxygen
3. Carbon and nitrogen
4. Phosphorus and chlorine
The shapes and names of some molecules are
shown below.
Phosphine is a compound of phosphorus and hydrogen.
The shape of a molecule of phosphine is likely to be
1. pyramidal
2. tetrahedral
3. bent
4. linear
A covalent bond would be expected to form between atoms which have the electron configurations
1. 2,8,1 and 2,8,7
2. 2,7 and 2,6
3. 2,8,8 and 2
4. 2,8,5 and 2,8,8,1
What would be the chemical formula of the compound formed between magnesium and nitrogen?
1. Mg₃N₂
2. Mg₂N₃
3. Mg₂N
4. MgN
Two neutral atoms, L and M, have the electron configurations shown below:
L: 2,8,5 M: 2,8,7
Which one of the following describes the bonding and gives the formula of the compound most likely formed when L and M combine?
1. Covalent; LM₃
2. Covalent; L₃M
3. Ionic; L₂M₅
4. Ionic; L₇M₅
For a covalent bond to be non-polar, the bonding atoms must have the same
1. electronegativity
2. number of valence electrons
3. atomic radius
4. number of neutrons

Bonding

Multiple Choice Quiz