The nitrogen oxide that does not contain N-N bond is:
N2O5
N2O3
NO2
N2O4
N2O
The Correct Option is A
Approach Solution - 1
Nitrogen oxide structures:
- N₂O₅: O₂N–O–NO₂ (no N–N bond)
- N₂O₃: ON–NO₂ (has N–N bond)
- NO₂: Single nitrogen atom (no N–N bond possible)
- N₂O₄: O₂N–NO₂ (has N–N bond)
- N₂O: N≡N⁺–O⁻ (has N–N bond)
Key observation: While NO₂ doesn't contain N–N bond (being mono-nitrogen), among the given options N₂O₅ is the only poly-nitrogen oxide without N–N bond.
Thus, the correct option is (A): N₂O₅.
Approach Solution -2
Analysis of Each Nitrogen Oxide:
To determine which nitrogen oxide does not contain an N–N bond, we need to analyze the molecular structures of each compound.
- (A) \( \text{N}_2\text{O}_5 \): - Structure: Two nitrogen atoms are bonded to five oxygen atoms. - Does not Contains an N–N bond.
- (B) \( \text{N}_2\text{O}_3 \): - Structure: Two nitrogen atoms are bonded to three oxygen atoms. - Contains an N–N bond.
- (C) \( \text{NO}_2 \): - Structure: One nitrogen atom is bonded to two oxygen atoms. - Contain an N–N bond.
- (D) \( \text{N}_2\text{O}_4 \): - Structure: Two nitrogen atoms are bonded to four oxygen atoms. - Contains an N–N bond.
- (E) \( \text{N}_2\text{O} \): - Structure: Two nitrogen atoms are bonded to one oxygen atom. - Contains an N–N bond.
Thus the correct option is (A): \( \text{N}_2\text{O}_5 \)
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Concepts Used:
Chemical Bonding and Molecular Structure
Such a group of atoms is called a molecule. Obviously, there must be some force that holds these constituent atoms together in the molecules. The attractive force which holds various constituents (atoms, ions, etc.) together in different chemical species is called a chemical bond.
Types of Chemical Bonds:
There are 4 types of chemical bonds which are formed by atoms or molecules to yield compounds.
- Ionic Bonds - Ionic bonding is a type of chemical bonding which involves a transfer of electrons from one atom or molecule to another.
- Covalent Bonds - Compounds that contain carbon commonly exhibit this type of chemical bonding.
- Hydrogen Bonds - It is a type of polar covalent bonding between oxygen and hydrogen wherein the hydrogen develops a partial positive charge
- Polar Bonds - In Polar Covalent chemical bonding, electrons are shared unequally since the more electronegative atom pulls the electron pair closer to itself and away from the less electronegative atom.
Factors Affecting Bond Enthalpy in Chemical Bonding:
- Size of the Atom
- Multiplicity of Bonds
- Number of Lone Pair of Electrons Present
- Bond Angle