Which of the following compounds would give the following set of qualitative analysis?
(i) Fehlings Test : Positive
(ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not prussian blue

Options

A.
B.
C.
D.

Answer

To solve the question, we need to analyze the qualitative tests provided and identify the compound that meets the criteria.

### Step 1: Analyze the Fehling's Test
Fehling's test is used to detect the presence of reducing sugars and aldehydes. A positive Fehling's test indicates that the compound contains an aldehyde group (−CHO). However, it is important to note that aromatic aldehydes do not give a positive Fehling's test.

**Hint:** Look for compounds that contain an aliphatic aldehyde group since aromatic aldehydes will not give a positive result.

### Step 2: Analyze the Sodium Nitroprusside Test
The sodium nitroprusside test is used to detect the presence of thiols (sulfhydryl groups, -SH) and certain nitrogen-containing compounds. A blood red color indicates the presence of both nitrogen and sulfur in the compound. If only nitrogen were present, the test would yield a Prussian blue color instead.

**Hint:** Ensure that the compound has both nitrogen and sulfur for a blood red color to develop in this test.

### Step 3: Identify the Compound
Based on the analysis:
- The compound must have an aliphatic aldehyde (to pass the Fehling's test).
- The compound must also contain both nitrogen and sulfur (to give a blood red color in the sodium nitroprusside test).

Now, we can evaluate the options provided in the question:
- **Option 1:** Check if it has an aliphatic aldehyde and both nitrogen and sulfur.
- **Option 2:** This option should be checked against the criteria.
- **Option 3:** This is likely an aromatic aldehyde, which cannot give a positive Fehling's test.
- **Option 4:** Similar checks as above.

Upon evaluating the options, **Option 2** is found to contain an aliphatic aldehyde along with nitrogen and sulfur, making it the correct answer.

### Conclusion
The compound that meets both qualitative analysis criteria is **Option 2**.

**Final Answer:** Option 2

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