Invert sugar is mixture of

Options

A. maltose and fructose
B. glucose and galactose
C. glucose and fructose
D. all of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Invert Sugar**: Invert sugar is a term used to describe a mixture that results from the hydrolysis of sucrose. It is primarily composed of two monosaccharides.

2. **Identifying the Components**: The two monosaccharides that make up invert sugar are glucose and fructose. Sucrose, which is a disaccharide, is made up of these two monosaccharides.

3. **Optical Activity**: The term "invert" refers to the change in the optical rotation of the sugar solution. Sucrose is dextrorotatory (rotates plane-polarized light to the right), while the resulting mixture of glucose and fructose is levorotatory (rotates light to the left). This change in rotation is what gives it the name "invert sugar".

4. **Analyzing the Options**:
- Option 1: Maltose and fructose - Incorrect.
- Option 2: Glucose and galactose - Incorrect.
- Option 3: Glucose and fructose - Correct.
- Option 4: All of the above - Incorrect.

5. **Conclusion**: The correct answer is that invert sugar is a mixture of glucose and fructose.

**Final Answer**: Invert sugar is a mixture of glucose and fructose.

---