Molisch reagent is used to identify following compound ?

Options

A. Glucose
B. Raffinose
C. Deoxyribose
D. all of the above

Answer

To solve the question regarding the identification of compounds using Molisch reagent, we can follow these steps:

### Step 1: Understand Molisch Reagent
Molisch reagent is a chemical reagent used to detect the presence of carbohydrates. It consists of alpha-naphthol dissolved in ethanol.

### Step 2: Identify the Reaction
When Molisch reagent is added to a carbohydrate and concentrated sulfuric acid is introduced, a reddish-purple colored complex is formed. This indicates a positive test for carbohydrates.

### Step 3: Analyze the Given Options
The options provided are:
- A) Glucose
- B) Raffinose
- C) Deoxyribose
- D) All of the above

### Step 4: Evaluate Each Option
1. **Glucose**: It is a simple sugar (monosaccharide) and a carbohydrate. Therefore, it will give a positive test with Molisch reagent.

2. **Raffinose**: This is a trisaccharide composed of galactose, glucose, and fructose. Since it is also a carbohydrate, it will also give a positive test with Molisch reagent.

3. **Deoxyribose**: This is a sugar (pentose) that is a component of DNA. It is also a carbohydrate, thus it will give a positive test with Molisch reagent.

### Step 5: Conclusion
Since all three compounds (glucose, raffinose, and deoxyribose) are carbohydrates and will give a positive test with Molisch reagent, the correct answer is:

**D) All of the above**