Low temperature is favourable for ……….. reactions.

Explanation

To answer the question "Low temperature is favorable for ……….. reactions," we need to analyze the relationship between temperature and the types of chemical reactions, specifically exothermic and endothermic reactions.

### Step-by-Step Solution:

1. **Understanding Reaction Types**:
- There are two main types of reactions based on heat exchange: exothermic and endothermic reactions.
- Exothermic reactions release heat (e.g., A → B + heat).
- Endothermic reactions absorb heat (e.g., C + heat → D).
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