The degree of dissociation of `PCl_(5)` will be more at ………. pressure.

Explanation

To determine the degree of dissociation of \( PCl_5 \) at different pressures, we can follow these steps:

### Step 1: Write the dissociation reaction
The dissociation of phosphorus pentachloride (\( PCl_5 \)) can be represented as:
\[ PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g) \]
This reaction shows that one mole of \( PCl_5 \) decomposes to form one mole of \( PCl_3 \) and one mole of \( Cl_2 \).
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