Question

Assertion (A): He and Ne do not form clathrates. Reason (R): He and Ne can be separated from Ar, Kr and Xe using quinol from the mixture of these gas.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is NOT the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

He and Ne are the "escape artists" of the noble gases—too small to stay in any chemical cage.

Answer 1

The Correct Option is B

Step 1: Concept Clathrates are "cage" compounds where guest molecules are trapped in the cavities of a host lattice (like quinol).

Step 2: Meaning Helium and Neon atoms are too small to be effectively trapped in the cavities of quinol or ice; they simply leak out.

Step 3: Analysis Assertion (A) is correct. Reason (R) is also correct because since Ar, Kr, and Xe form clathrates and He/Ne do not, this difference in property can be used for separation. However, the ability to separate them is a *result* of the fact in (A), not the *cause* of why they don't form clathrates.

Step 4: Conclusion Both are correct statements, but (R) is not the explanation for (A). Final Answer: (B)