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Question: Answered & Verified by Expert
Assertion (A) 16th group elements have higher ionisation enthalpy values than 15th group elements in the corresponding periods.
Reason (R) 15th group elements have half-filled stable electronic configurations.
ChemistryClassification of Elements and Periodicity in PropertiesAP EAMCETAP EAMCET 2022 (05 Jul Shift 1)
Options:
  • A Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$.
  • B Both $A$ and $R$ are correct put $R$ is not the correct explanation of $A$.
  • C $A$ is correct but $R$ is incorrect.
  • D $A$ is incorrect but $R$ is correct.
Solution:
1387 Upvotes Verified Answer
The correct answer is: $A$ is incorrect but $R$ is correct.
(A) is incorrect but $(\mathrm{R})$ is correct as ionisation enthalpy values of group 15 th is higher than group 16th due to stable half-filled electronic configurations.

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