Chemistry: Covalent Bonds and Valency Quiz

Play an AI-generated podcast conversation about this lesson

What is the primary reason for the polarity in the bond between the hydrogen atom and oxygen atom in a water molecule?

Hydrogen and oxygen atoms have the same electronegativity values.
The difference in electronegativity between hydrogen and oxygen is greater than 0.5. (correct)
Hydrogen and oxygen atoms form an ionic bond.
The difference in electronegativity between hydrogen and oxygen is less than 0.5.

Which of the following statements about the carbon-hydrogen (C-H) bond is correct?

The C-H bond is polar covalent because the difference in electronegativity is greater than 0.5.
The C-H bond is ionic because carbon and hydrogen have the same electronegativity values.
The C-H bond is a strong bond that is not easily disturbed.
The C-H bond is non-polar covalent because the difference in electronegativity is less than 0.5. (correct)

What is the primary reason for the strength of an ionic bond?

The atoms involved in the bond have the same electronegativity values.
The bond is formed by the transfer of electrons from one atom to another.
The atoms involved in the bond are in their ionic state (positively or negatively charged). (correct)
The bond is not easily disturbed and remains strong as long as it is not disrupted.

What happens to the ionic bond between sodium (Na) and chlorine (Cl) when water is added to sodium chloride (NaCl)?

The ionic bond becomes weaker and more fragile, eventually breaking apart. (B) Signup and view all the answers

What is the relationship between the difference in electronegativity and the type of bond formed between two atoms?

A difference in electronegativity of 0.5 or more results in a polar covalent bond. (B) Signup and view all the answers

Which of the following statements about the carbon-oxygen (C-O) bond is correct?

The C-O bond is polar covalent because the difference in electronegativity is greater than 0.5. (A) Signup and view all the answers

What is the primary factor that determines the strength of an ionic bond?

The ability of the atoms to form positive and negative ions. (A) Signup and view all the answers

Which of the following statements about the valency of an atom is correct?

Valency is the number of covalent bonds an atom can form with other atoms. (C) Signup and view all the answers

How does the strength of a covalent bond compare to the strength of an ionic bond?

Ionic bonds are generally stronger than covalent bonds. (D) Signup and view all the answers

What is the primary difference between a polar covalent bond and a non-polar covalent bond?

Polar covalent bonds involve the unequal sharing of electrons, while non-polar covalent bonds involve the equal sharing of electrons. (C) Signup and view all the answers

Water molecule polarity reason

The significant difference in electronegativity between hydrogen and oxygen creates a polar covalent bond in a water molecule.

C-H bond type

The carbon-hydrogen bond is nonpolar covalent because the difference in electronegativity is less than 0.5.

Ionic bond strength reason

The force of ionic bonding is high due to the strong electrostatic attraction between positive and negative ions.