AP EAMCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Assertion (A) : Noble gases have very low boiling points.Reason (R) : All noble gases have general electronic configuration of \(ns^2\ np^6\) (except He).

A Both (A) and (R) are true and (R) is the correct
explanation of (A)
B (A) is false but (R) is true
C (A) is true but (R) is false
D Both (A) and (R) are true and (R) is the not the
correct explanation of (A)

Verified Solution

Answer & Solution

Correct Answer

(D) Both (A) and (R) are true and (R) is the not the
correct explanation of (A)

Step-by-step Solution

Detailed explanation

Boiling points of noble gases are low due to only acting weak van der Waal’s forces of attraction between the atoms.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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