Glucose does not give

Options

A. Schiff's test
B. Hydrogensulphite addition product with `NaHSO_(3)`
C. 2,4 DNP test
D. All of these

Answer

To solve the question "Glucose does not give which of the following tests?", we will analyze the properties of glucose and the tests it undergoes.

### Step-by-Step Solution:

1. **Understanding the Structure of Glucose**:
- Glucose is a simple sugar (monosaccharide) with the molecular formula C6H12O6.
- It can exist in an open-chain form and a cyclic form (pyranose).

2. **Identifying Functional Groups**:
- In its open-chain form, glucose contains an aldehyde group (-CHO).
- In its cyclic form, glucose predominantly exists as a six-membered ring (pyranose) and is more stable.

3. **Knowing the Tests for Sugars**:
- Common tests for sugars include:
- Benedict's test
- Fehling's test
- Tollen's test
- Seliwanoff's test
- Skips test

4. **Analyzing the Skips Test**:
- The Skips test is used to detect the presence of reducing sugars.
- It involves the formation of a hydrazone with the aldehyde group.
- However, glucose predominantly exists in its cyclic form, which does not readily react with the weak base present in Skips reagent.

5. **Conclusion**:
- Since glucose does not readily form a hydrazone in the Skips test due to its stable cyclic structure, it gives a negative result for this test.
- Therefore, the correct answer to the question is that glucose does not give a Skips test.

### Final Answer:
Glucose does not give a Skips test.