Low pressure favoures those reactions which occur with ……….. in the number of molecule.

Explanation

To solve the question, we need to understand how changes in pressure affect chemical reactions, particularly in terms of the number of molecules involved in the reaction.

### Step-by-Step Solution:

1. **Understanding the Concept of Equilibrium**:
- In a chemical reaction at equilibrium, the rates of the forward and reverse reactions are equal. This means that the concentrations of the reactants and products remain constant over time.

2. **Effect of Pressure on Equilibrium**:
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