Molisch's test given by

Options

A. Carbohydrates
B. Lipids
C. Amino acid
D. Proteins

Answer

**Step-by-Step Solution:**

1. **Understanding Molisch's Test**:
Molisch's test is a chemical test used to detect the presence of carbohydrates in a given compound. It is based on the principle of dehydration.

2. **Dehydration Reaction**:
The test involves the removal of water (dehydration) from carbohydrates when treated with strong acids, such as sulfuric acid (H2SO4) or hydrochloric acid (HCl).

3. **Formation of Aldehyde**:
During the test, the carbohydrate undergoes dehydration to produce an aldehyde. For example, when glucose (C6H12O6) is subjected to Molisch's test, it will be dehydrated to form an aldehyde.

4. **Observation of the Test**:
After performing the test, a violet ring is observed at the interface of the two layers (the acid and the carbohydrate solution). This violet ring indicates a positive result for the presence of carbohydrates.

5. **Conclusion**:
Therefore, the answer to the question "Molisch's test is given by" is that it is given by carbohydrates.

**Final Answer**: Molisch's test is given by carbohydrates.

---