Temperature above which gas cannot be liquefied is called .........

Explanation

To solve the question, "Temperature above which gas cannot be liquefied is called .........", we can follow these steps:

### Step 1: Understand the Concept of Liquefaction of Gases
Liquefaction of gases can occur by either decreasing the temperature or increasing the pressure. When the temperature is lowered, the kinetic energy of gas particles decreases, allowing them to come closer together and form a liquid. Similarly, increasing the pressure compresses the gas particles, also facilitating liquefaction.

**Hint:** Consider how temperature and pressure affect the state of matter.

### Step 2: Identify the Limitation of Liquefaction
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