Which of the following statement(s) is/are incorrect for noble gases ?

Options

A. Argon is used in higher temperature metallurgical process because of their inert nature.
B. Krypton and xenon form clathrate compounds with quinol having chemical formula not exact but approximately 3 quinol molecules : 1 gas molecule.
C. All the noble gases are monoatomic.
D. Noble gases are completely soluble in water.

Answer

To determine which of the statements regarding noble gases is incorrect, we will analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement:** Argon is used in higher temperature metallurgical processes because of their inert nature.

**Analysis:** This statement is correct. Argon is indeed a noble gas and is used in high-temperature processes due to its inertness. Noble gases have a complete octet, making them highly unreactive, which is why argon can be safely used in such applications without reacting with other materials.

### Step 2: Analyze the second statement
**Statement:** Krypton and xenon form clathrate compounds with quinone having a chemical formula of approximately three quinol molecules to one gas molecule.

**Analysis:** This statement is also correct. Krypton and xenon can indeed form clathrate compounds with quinone, and the ratio mentioned (approximately 3:1) is accurate. Clathrate compounds are structures in which gas molecules are trapped within a lattice of another substance.

### Step 3: Analyze the third statement
**Statement:** All the noble gases are monatomic because of their complete octet.

**Analysis:** This statement is correct. Noble gases, such as helium, neon, argon, krypton, and xenon, exist as monatomic gases due to their complete octet configuration. They do not need to bond with other atoms to achieve stability, which is why they are found as single atoms in nature.

### Step 4: Analyze the fourth statement
**Statement:** Noble gases are completely soluble in water.

**Analysis:** This statement is incorrect. Noble gases are not soluble in water due to their inert nature and lack of reactivity. They do not interact with water molecules, making them insoluble.

### Conclusion
Based on the analysis, the incorrect statement regarding noble gases is the fourth one: "Noble gases are completely soluble in water."

### Final Answer
The incorrect statement is: **Noble gases are completely soluble in water.**

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