Which of the following is solid in nature

Options

A. NO
B. `N_2 O`
C. `N_2 O_3`
D. `N_2 O_5`

Explanation

To determine which of the given compounds is solid in nature, we can analyze the physical states of each compound mentioned. Here’s a step-by-step solution:

### Step 1: Identify the Compounds
The compounds mentioned in the question are:
1. NO (Nitric oxide)
2. N2O (Dinitrogen monoxide, also known as laughing gas)
3. N2O3 (Dinitrogen trioxide)
4. N2O5 (Dinitrogen pentoxide)

### Step 2: Determine the Physical States
Now, we will look at the physical states of each compound:
- **NO (Nitric oxide)**: This compound is a gas at room temperature.
- **N2O (Dinitrogen monoxide)**: This compound is also a gas at room temperature and is commonly known as laughing gas.
- **N2O3 (Dinitrogen trioxide)**: This compound is typically a blue liquid at room temperature.
- **N2O5 (Dinitrogen pentoxide)**: This compound is a white solid at room temperature.

### Step 3: Conclusion
From the analysis above, the only compound that is solid in nature is **N2O5 (Dinitrogen pentoxide)**.

### Final Answer
Thus, the answer to the question is **N2O5 (Dinitrogen pentoxide)**, which is option number 4.

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