What is not true about `N_2O_3` ?

Options

A. It is an equimolar mixture of NO and `NO_2`
B. N - N bond length is approximately 186 pm
C. Bond angle around N atoms are equal
D. All the bond angles around N atoms are different

Answer

To determine what is not true about \( N_2O_3 \), we will analyze the properties and characteristics of the compound step by step.

### Step 1: Understand the Composition of \( N_2O_3 \)
\( N_2O_3 \) is known as dinitrogen trioxide. It is formed from the reaction of nitrogen monoxide (NO) and nitrogen dioxide (NO2).

**Hint:** Recall the basic chemical reaction that leads to the formation of \( N_2O_3 \).

### Step 2: Analyze the Structure of \( N_2O_3 \)
The structure of \( N_2O_3 \) consists of two nitrogen atoms and three oxygen atoms. The nitrogen atoms are bonded to each other and to the oxygen atoms.

**Hint:** Visualize the Lewis structure of \( N_2O_3 \) to understand the bonding and arrangement of atoms.

### Step 3: Evaluate the Bond Lengths
The bond length between the nitrogen atoms (N-N) in \( N_2O_3 \) is approximately 186 picometers. This is a factual statement regarding the bond length.

**Hint:** Compare this bond length with typical N-N bond lengths in other nitrogen compounds.

### Step 4: Assess the Bond Angles
In \( N_2O_3 \), the bond angles around the nitrogen atoms are not equal. This is due to the presence of lone pairs on one of the nitrogen atoms, which causes repulsion and alters the bond angles.

**Hint:** Remember VSEPR theory, which explains how lone pairs affect molecular geometry and bond angles.

### Step 5: Identify the Incorrect Statement
Based on the analysis:
1. \( N_2O_3 \) is indeed an equimolar mixture of NO and NO2 (True).
2. The N-N bond length is approximately 186 picometers (True).
3. The bond angles around the nitrogen atoms are equal (Not True).

Thus, the statement that is not true about \( N_2O_3 \) is that the bond angles around the nitrogen atoms are equal.

**Final Answer:** The statement that is not true about \( N_2O_3 \) is that the bond angles around the nitrogen atoms are equal.