Which one of the following pairs is obtained on heating ammonium dichromate?

Options

A. `N_(2)" and "H_(2)O`
B. `N_(2)O" and "H_(2)O`
C. `NO" and "H_(2)O`
D. `NO" and "N_(2)O`

Explanation

To solve the question regarding the products obtained from heating ammonium dichromate, we can follow these steps:

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

### Step 2: Understand the decomposition reaction.
When ammonium dichromate is heated, it undergoes thermal decomposition. This means it breaks down into simpler substances upon heating.

### Step 3: Identify the products of the reaction.
The decomposition of ammonium dichromate produces nitrogen gas (\( \text{N}_2 \)), chromium(III) oxide (\( \text{Cr}_2\text{O}_3 \)), and water (\( \text{H}_2\text{O} \)). The balanced equation for this reaction is:
\[ \text{(NH}_4\text{)}_2\text{Cr}_2\text{O}_7 \rightarrow \text{N}_2 + \text{Cr}_2\text{O}_3 + 4 \text{H}_2\text{O} \]

### Step 4: Match the products with the options given.
Now, we need to compare the products \( \text{N}_2 \) and \( \text{H}_2\text{O} \) with the options provided in the question. The correct pair of products obtained from the heating of ammonium dichromate is \( \text{N}_2 \) and \( \text{H}_2\text{O} \).

### Step 5: Choose the correct answer.
Based on the analysis, the correct answer to the question is the pair \( \text{N}_2 \) and \( \text{H}_2\text{O} \).

### Final Answer:
The correct pair obtained on heating ammonium dichromate is \( \text{N}_2 \) and \( \text{H}_2\text{O} \).

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