Covalent Bond Test! Trivia Quiz

1. What is a covalent bond?

The transfer of electrons from one atom to another atom

option 1 is ionic bonding.

Explanation

option 1 is ionic bonding.

2.

What are the ions present in this dot and cross diagram?

Helium and Fluorine ions

Hydrogen and Sodium ions

Hydrogen and Flourine ions

The dot and cross diagram shows two elements, hydrogen and fluorine, which have gained or lost electrons to form ions. Hydrogen has lost an electron and become a positive ion, while fluorine has gained an electron and become a negative ion. Therefore, the correct answer is hydrogen and fluorine ions.

Explanation

The dot and cross diagram shows two elements, hydrogen and fluorine, which have gained or lost electrons to form ions. Hydrogen has lost an electron and become a positive ion, while fluorine has gained an electron and become a negative ion. Therefore, the correct answer is hydrogen and fluorine ions.

3. What type of bond is present in this structural formula?

X = X

Single Bond

Double Bond

Triple Bond

two lines between 2 atoms represent a double covalent bond.

Explanation

two lines between 2 atoms represent a double covalent bond.

4. Which pair of ions will form a double bond?

Hydrogen ions

Oxygen ions

Nitrogen ions

an oxygen molecule involves a double as oxygen ion requires 2 electrons to achieve a stable electronic configuration of a noble gas. therefore it shares 2 electrons with the other oxygen ion which also shares 2 electrons.

Explanation

an oxygen molecule involves a double as oxygen ion requires 2 electrons to achieve a stable electronic configuration of a noble gas. therefore it shares 2 electrons with the other oxygen ion which also shares 2 electrons.

5. Which of these is covalent bonding? i) σ-bonding ii) π-bonding iii) agostic interactions iv) three-center two-electron bonds

I) and iii)

I) only

Ii), iii) and iv)

All of the above

Covalent bonding includes many kinds of interaction, including σ-bonding, π-bonding, agostic interactions, and three-center two-electron bonds.

Explanation

Covalent bonding includes many kinds of interaction, including σ-bonding, π-bonding, agostic interactions, and three-center two-electron bonds.

6. What is missing in this dot and cross diagram?

There should be 4 lone pairs of electrons added for the Oxygen ion.

Oxygen should share 4 electrons with 4 Hydrogen Ions.

There should be 2 lone pairs of electrons added for Hydrogen ions.

Lone pairs should be drawn in a dot-and-cross diagram. therefore, there should be 4 lone pairs around the oxygen ion as it has 6 valence electrons and would only share 2 electrons.

Explanation

Lone pairs should be drawn in a dot-and-cross diagram. therefore, there should be 4 lone pairs around the oxygen ion as it has 6 valence electrons and would only share 2 electrons.

7.

What is the chemical formula for this dot-and-cross covalent bond diagram?

CaOH

2CaOH

Ca(OH)2

Ca has a valency of 2+ while hydroxide has a valency of 1-. Therefore the compund of these 2 ions will form Ca(OH)2

Explanation

Ca has a valency of 2+ while hydroxide has a valency of 1-. Therefore the compund of these 2 ions will form Ca(OH)2

8. What are the strongest type of covalent chemical bond?

Pi bond

Sigma Bond

Polar Bond

Non-Polar Bond

A sigma bond is the strongest type of covalent chemical bond. It is formed by the overlap of atomic orbitals along the axis connecting the bonded atoms. This type of bond allows for the maximum sharing of electrons between the atoms, resulting in a strong and stable bond. Pi bonds, on the other hand, are formed by the sideways overlap of atomic orbitals and are generally weaker than sigma bonds. Polar and non-polar bonds refer to the distribution of charge within a molecule and do not determine the strength of the bond.

Explanation

A sigma bond is the strongest type of covalent chemical bond. It is formed by the overlap of atomic orbitals along the axis connecting the bonded atoms. This type of bond allows for the maximum sharing of electrons between the atoms, resulting in a strong and stable bond. Pi bonds, on the other hand, are formed by the sideways overlap of atomic orbitals and are generally weaker than sigma bonds. Polar and non-polar bonds refer to the distribution of charge within a molecule and do not determine the strength of the bond.