The critical temperatures of `CO_2` gas and `N_2` gas are `31^(@)`C and `-147^(@)` C, respectively. Which gas is liquefied easily and why ?

Explanation

To determine which gas, CO₂ or N₂, is liquefied more easily, we need to analyze their critical temperatures and understand the concept of critical temperature.

### Step-by-Step Solution:

1. **Understand Critical Temperature**:
- The critical temperature is defined as the highest temperature at which a substance can exist in the liquid state. Above this temperature, the substance cannot be liquefied regardless of the pressure applied.

2. **Identify the Critical Temperatures**:
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