Molish test is given by :

Options

A. All carbohydratres
B. Sucrose only
C. Fructose only
D. Glucose only

Answer

### Step-by-Step Solution:

1. **Understanding the Molish Test**: The Molish test is a qualitative test used to detect the presence of carbohydrates. It is based on the formation of a colored complex when carbohydrates are treated with a specific reagent.

**Hint**: Remember that the Molish test is specifically for carbohydrates.

2. **Reagents Used**: The test involves the use of α-naphthol and concentrated sulfuric acid (H₂SO₄). The sulfuric acid acts as a dehydrating agent.

**Hint**: Identify the key reagents involved in the Molish test.

3. **Reaction Mechanism**: When a carbohydrate (like glucose) is treated with sulfuric acid, it undergoes dehydration to form an aldehyde. This aldehyde then reacts with α-naphthol to form a colored compound.

**Hint**: Focus on the dehydration process and the formation of the aldehyde.

4. **Formation of the Violet Ring**: After the addition of α-naphthol, the mixture is shaken, and a violet ring appears at the interface of the two liquids. This indicates a positive result for the presence of carbohydrates.

**Hint**: The appearance of a violet ring is a crucial indicator in the Molish test.

5. **Conclusion**: Since the Molish test is sensitive to all types of carbohydrates, it can be concluded that the test is given by all carbohydrates.

**Hint**: Remember that the test is not specific to one carbohydrate but applies to all.

### Final Answer:
The Molish test is given by all carbohydrates.