Chemistry-(general)
NEET Chemistry (general) Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 12
Assertion (A): Group 18 elements have very high ionisation enthalpies. | Reason (R): Group 18 elements have fully filled valence shells, making them chemically inert.
A
Both (A) and (R) are true, and (R) explains (A).
B
Both (A) and (R) are true, but (R) does not explain (A).
C
(A) is true, but (R) is false.
D
(A) is false, but (R) is true.
Correct Answer
Option A
Detailed Explanation
Group 18 elements have high ionisation enthalpies due to their fully filled valence shells, which make them stable and chemically inert, as discussed in the NCERT context regarding atomic properties.
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