Racemic mixture is formed ny mixing two:

Options

A. Isomeric compounds
B. Chiral compounds
C. Meso compound
D. Optical isomers

Answer

To solve the question "Racemic mixture is formed by mixing two:", we will analyze the options provided and arrive at the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding Racemic Mixture**:
A racemic mixture is defined as an equimolecular mixture of two enantiomers of a chiral compound. Enantiomers are pairs of molecules that are non-superimposable mirror images of each other.

**Hint**: Recall that enantiomers are a type of stereoisomer that have specific optical properties.

2. **Identifying Enantiomers**:
Enantiomers are optical isomers that exhibit optical activity. They rotate plane-polarized light in opposite directions; one is dextrorotatory (rotates light to the right) and the other is levorotatory (rotates light to the left).

**Hint**: Think about how enantiomers interact with polarized light and how they are related.

3. **Equimolecular Mixture**:
A racemic mixture contains equal amounts of both enantiomers. This means that the optical activities of the two enantiomers cancel each other out, resulting in an optically inactive solution.

**Hint**: Consider the implications of mixing equal parts of two substances with opposite optical activities.

4. **Analyzing the Options**:
- **Option A: Isomeric compound** - This is too broad and does not specifically refer to enantiomers.
- **Option B: Chiral compounds** - While chiral compounds can form enantiomers, the term itself does not specifically imply the formation of a racemic mixture.
- **Option C: Metzo compound** - This is not relevant to the formation of a racemic mixture.
- **Option D: Optical isomers** - This is the correct answer, as optical isomers specifically refer to enantiomers, which are the components of a racemic mixture.

5. **Conclusion**:
Based on the analysis, the correct answer is **Option D: Optical isomers**. A racemic mixture is formed by mixing two optical isomers (enantiomers).

### Final Answer:
Racemic mixture is formed by mixing two **optical isomers**.