Which of the following compounds have both polar covalent and ionic bonds? NH3Br H2O2 HCN H2S None of these By accessing this Question Assistance you will learn while you earn points based on the Point Portal MacBook Air
The Correct Answer and Explanation is:
Correct Answer: NH₃Br
Explanation:
To determine which compound contains both polar covalent and ionic bonds, we need to understand what these types of bonds are:
- Polar covalent bonds occur when electrons are shared unequally between atoms with different electronegativities (for example, between hydrogen and oxygen).
- Ionic bonds occur when electrons are transferred from a metal to a nonmetal, creating oppositely charged ions.
Let’s analyze each compound:
- NH₃Br (Ammonium bromide):
This compound consists of the ammonium ion (NH₄⁺) and the bromide ion (Br⁻).
- The bond between NH₄⁺ and Br⁻ is ionic, as it involves a positively charged ion and a negatively charged ion.
- Inside the NH₄⁺ ion, the nitrogen and hydrogen atoms are bonded covalently, and due to the difference in electronegativity, these bonds are polar covalent.
✅ Contains both polar covalent and ionic bonds.
- H₂O₂ (Hydrogen peroxide):
- The bonds in this molecule (O–O and O–H) are polar covalent, but there are no ionic bonds present.
❌ Only polar covalent bonds.
- HCN (Hydrogen cyanide):
- The bonds (H–C and C≡N) are polar covalent, but again, no ionic bonding is present.
❌ Only polar covalent bonds.
- H₂S (Hydrogen sulfide):
- The H–S bonds are polar covalent, but this molecule is not ionic.
❌ Only polar covalent bonds.
- None of these:
Incorrect, because NH₃Br fits the condition.
❌ Incorrect choice.
Conclusion:
NH₃Br is the correct answer because it contains ionic bonds (between NH₄⁺ and Br⁻) and polar covalent bonds (between nitrogen and hydrogen within NH₄⁺). The other options only contain polar covalent bonds without any ionic character.
