Greater the critical temperature of a gas, more easily the gas can be liquefied.

Explanation

**Step-by-Step Solution:**

1. **Understanding Critical Temperature (Tc):**
- The critical temperature of a gas is defined as the highest temperature at which a substance can exist as a liquid. Above this temperature, no amount of pressure can liquefy the gas.
- For example, hydrogen has a critical temperature of -240°C. This means that at any temperature above -240°C, hydrogen cannot be liquefied regardless of the pressure applied.

2. **Relation Between Critical Temperature and Liquefaction:**
- If a gas has a high critical temperature, it means that it can be liquefied at relatively higher temperatures. For instance, if a gas has a critical temperature of 100°C, it can be liquefied at room temperature (around 20°C) by applying pressure.
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