Analyze Statement I

Statement I says: "Noble gases have very high boiling points."

This is false.

• Noble gases exist as monoatomic species.
• The only attractive forces between their atoms are weak London dispersion forces.
• Therefore, noble gases have very low boiling points, not very high boiling points.

So, Statement I is false.

Analyze Statement II

Statement II says: "Noble gases are monoatomic gases. They are held together by strong dispersion forces. Because of this they are liquefied at very low temperature. Hence, they have very high boiling points."

Let us check each part:

• "Noble gases are monoatomic gases" → True.
• "They are held together by strong dispersion forces" → False, because dispersion forces in noble gases are generally weak, though they increase down the group.
• "Because of this they are liquefied at very low temperature" → Noble gases do liquefy only at very low temperatures, but this is due to weak intermolecular forces, not strong ones.
• "Hence, they have very high boiling points" → False; they actually have low boiling points.

Since the statement as a whole contains incorrect reasoning and incorrect conclusion, Statement II is false.

Choose the correct option

• Statement I: False
• Statement II: False

Therefore, the correct option is:

$\boxed{\text{A}}$

Comparison with stored correct answer

Stored correct answer: A

My derived answer: A

They match.