Ammonium dichromate on heating gives

Options

A. `N_2O`
B. `(NH_4)CrO_4`
C. `CRO_3`
D. `Cr_2O_3`

Answer

To solve the question "Ammonium dichromate on heating gives," we can follow these steps:

### Step 1: Write the formula for ammonium dichromate
Ammonium dichromate is represented by the chemical formula \( \text{(NH}_4)_2\text{Cr}_2\text{O}_7 \).

### Step 2: Identify the decomposition reaction
When ammonium dichromate is heated, it undergoes a decomposition reaction. This means it breaks down into simpler products.

### Step 3: Write the balanced chemical equation
The balanced equation for the decomposition of ammonium dichromate is:
\[ \text{(NH}_4)_2\text{Cr}_2\text{O}_7 \xrightarrow{\text{heat}} \text{Cr}_2\text{O}_3 + \text{N}_2 + \text{H}_2\text{O} \]

### Step 4: Identify the products
From the balanced equation, we can identify the products formed upon heating:
- \( \text{Cr}_2\text{O}_3 \) (chromic oxide, which is green in color)
- \( \text{N}_2 \) (nitrogen gas, which is colorless)
- \( \text{H}_2\text{O} \) (water)

### Step 5: Conclusion
Thus, the correct answer to the question is that ammonium dichromate on heating gives chromic oxide, nitrogen gas, and water.

### Final Answer
The products of heating ammonium dichromate are:
- Chromic oxide (\( \text{Cr}_2\text{O}_3 \))
- Nitrogen gas (\( \text{N}_2 \))
- Water (\( \text{H}_2\text{O} \))