The compound which is not formed on heating `Be(NO_3)_2` is

Options

A. `N_2O`
B. `O_2`
C. `NO_2`
D. BeO

Answer

To solve the question regarding the compounds formed upon heating beryllium nitrate, \( Be(NO_3)_2 \), we will analyze the decomposition reaction that occurs when beryllium nitrate is heated.

### Step 1: Write the decomposition reaction
When beryllium nitrate is heated, it decomposes into beryllium oxide, nitrogen dioxide, and oxygen. The balanced chemical equation for this reaction is:

\[ 2 Be(NO_3)_2 \rightarrow BeO + 4 NO_2 + O_2 \]

### Step 2: Identify the products
From the balanced equation, we can identify the products formed:
- Beryllium oxide (\( BeO \))
- Nitrogen dioxide (\( NO_2 \))
- Oxygen (\( O_2 \))

### Step 3: Analyze the options given
The question asks which compound is **not** formed from the heating of \( Be(NO_3)_2 \). The options provided are:
1. \( N_2O \) (Nitrous oxide)
2. \( O_2 \) (Oxygen)
3. \( NO_2 \) (Nitrogen dioxide)
4. \( BeO \) (Beryllium oxide)

### Step 4: Compare the products with the options
From our analysis:
- \( BeO \) is formed (product of the reaction).
- \( NO_2 \) is formed (product of the reaction).
- \( O_2 \) is formed (product of the reaction).
- \( N_2O \) is **not** formed (it is not a product of the reaction).

### Conclusion
The compound that is **not** formed on heating \( Be(NO_3)_2 \) is \( N_2O \) (Nitrous oxide).

Thus, the answer is:
**N2O (Nitrous oxide)**

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