Which is favourable for homolysis :-

Options

A. Low temperature
B. Nonpolar medium
C. ) Polar medium
D. All

Answer

To determine which condition is favorable for homolysis, we need to understand the concept of homolysis and the factors that influence it.

### Step-by-Step Solution:

1. **Define Homolysis**:
Homolysis refers to the process of bond cleavage where a covalent bond breaks evenly, resulting in the formation of two free radicals. Each atom retains one of the shared electrons from the bond.

2. **Identify the Conditions**:
The question presents four conditions: low temperature, non-polar medium, polar medium, and all of these.

3. **Analyze the Role of Temperature**:
- Low temperature is generally favorable for the formation of free radicals. At lower temperatures, the energy required to break bonds is reduced, making it easier for homolysis to occur.
- High temperatures typically favor reactions that require more energy input, which may not favor homolysis.

4. **Consider the Medium**:
- **Non-polar Medium**: In a non-polar medium, there are fewer interactions with solvent molecules, which can stabilize free radicals. Therefore, non-polar solvents can favor radical formation.
- **Polar Medium**: Polar solvents can stabilize ionic species better than free radicals, which may not favor homolysis as effectively as non-polar solvents.

5. **Conclusion**:
Given the analysis, low temperature is the most favorable condition for homolysis because it promotes the formation of free radicals. While non-polar mediums can also favor radical formation, the question specifically asks for the most favorable condition, which is low temperature.

### Final Answer:
The correct answer is **Low Temperature**.

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