On hydrolysis which of the following carbohydrates give only glucose?

Options

A. (a) Sucrose
B. (b) Lactose
C. (c) Maltose
D. (d) Raffinose

Answer

To determine which carbohydrate gives only glucose upon hydrolysis, we need to analyze the hydrolysis products of the given carbohydrates. Here’s a step-by-step solution:

### Step 1: Understand Hydrolysis of Carbohydrates
Carbohydrates can be classified into monosaccharides, disaccharides, and polysaccharides. Hydrolysis is a chemical process that breaks down these carbohydrates into their constituent monosaccharides by adding water.

### Step 2: Analyze Each Option
We will examine each carbohydrate option provided to see what products they yield upon hydrolysis.

- **Option A: Sucrose**
- Sucrose is a disaccharide composed of glucose and fructose.
- Upon hydrolysis, sucrose breaks down into glucose + fructose.
- **Conclusion**: This does not give only glucose.

- **Option B: Lactose**
- Lactose is also a disaccharide made up of glucose and galactose.
- Upon hydrolysis, lactose yields glucose + galactose.
- **Conclusion**: This does not give only glucose.

- **Option C: Maltose**
- Maltose is a disaccharide consisting of two glucose units.
- Upon hydrolysis, maltose breaks down into glucose + glucose.
- **Conclusion**: This gives only glucose.

- **Option D: Raffinose**
- Raffinose is a trisaccharide composed of glucose, fructose, and galactose.
- Upon hydrolysis, raffinose yields glucose + fructose + galactose.
- **Conclusion**: This does not give only glucose.

### Step 3: Identify the Correct Answer
After analyzing all the options, we find that only maltose (Option C) gives only glucose upon hydrolysis.

### Final Answer
The carbohydrate that gives only glucose upon hydrolysis is **C: Maltose**.

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