Assertion: If yellow precipitate is obtained on adding ammonium molybdate solution on boiling then phosphoate radical is identified.
Reason: Ammonium phosphomolybdate is a yellow compound.

Options

A. If assertion is true but the reason is false
B. If assertion is false but reason is true
C. If both assertion and reason are true and reason is the correct explanation of assertion
D. If oth assertion and reason are true but reason is not the correct explanation of assertion

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that if a yellow precipitate is obtained upon adding ammonium molybdate solution while boiling, then the phosphate radical (PO4^3-) is identified.
- This means that the presence of phosphate ions can be confirmed by observing a yellow precipitate when ammonium molybdate is added.

2. **Understanding the Reason**:
- The reason given is that ammonium phosphomolybdate is a yellow compound.
- Ammonium phosphomolybdate is indeed a yellow precipitate formed when ammonium molybdate reacts with phosphate ions in a solution.

3. **Chemical Reaction**:
- When ammonium molybdate ((NH4)6Mo7O24) is added to a solution containing phosphate ions (PO4^3-), and the mixture is heated (usually at mild temperatures), a yellow precipitate of ammonium phosphomolybdate (NH4)3PO4·12MoO3 is formed.

4. **Conclusion**:
- Since the assertion correctly states that a yellow precipitate indicates the presence of phosphate ions, and the reason accurately explains that this yellow precipitate is ammonium phosphomolybdate, both the assertion and reason are true.
- Therefore, the assertion is correct, and the reason is a correct explanation of the assertion.

5. **Final Answer**:
- The correct answer is that both the assertion and reason are true, and the reason is the correct explanation for the assertion.