Compound X `(C_8H_8O)` will give following laboratory test.
`{:("Isomers",FeCl_3,AgNO_3//NH_4OH,"Na metal"),(X,"Coloured solution","Negative",1//2H_2darr):}`
X can be :

Options

A.
B.
C.
D.

Answer

To determine the compound X `(C_8H_8O)` based on the given laboratory tests, we will analyze each test step by step.

### Step 1: Analyze the first test with FeCl3
- **Observation**: The reaction with FeCl3 gives a colored solution.
- **Interpretation**: This indicates the presence of a phenolic -OH group, as phenols react with FeCl3 to form colored complexes.
- **Conclusion**: Therefore, compound X must contain a phenolic -OH group.

### Step 2: Analyze the second test with AgNO3/NH4OH
- **Observation**: The reaction with AgNO3 in the presence of NH4OH gives a negative result.
- **Interpretation**: A negative result in this test suggests that compound X is not an aldehyde or a reducing sugar, as these would typically give a positive result (silver mirror).
- **Conclusion**: This eliminates any compounds that could be aldehydes.

### Step 3: Analyze the third test with sodium metal
- **Observation**: The reaction with sodium metal produces hydrogen gas.
- **Interpretation**: The evolution of hydrogen indicates the presence of an active hydrogen atom, which is typically found in alcohols or phenols.
- **Conclusion**: Since we already established that X is a phenol, this confirms that it has an -OH group that can react with sodium to release hydrogen.

### Step 4: Identify possible structures for X
- **Given**: The molecular formula is C8H8O.
- **Considering the characteristics**: Since X is a phenol (due to the colored solution with FeCl3) and does not react as an aldehyde (negative with AgNO3/NH4OH), we can consider possible structures.
- **Conclusion**: The only viable structure that fits all these criteria is a substituted phenol, specifically one that has an -OH group and does not contain an aldehyde functional group.

### Final Conclusion
Based on the analysis of the tests, the compound X `(C_8H_8O)` is likely to be **Cresol** or **p-Cresol**, which is a phenolic compound that fits the molecular formula and the test results.

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