Verified Solution • 2025–26 Session
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QJEEM22Ch5b5f: JEE Main 2022 Chemistry - Class 11 JEEM22Ch5b5f Solution: Given below are two statements : one is labelled as Assertion…
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The ionic radii of O2 and Mg2+ are same.
Reason (R) : Both O2 and Mg2+ are isoelectronic species.
In the light of the above statements, choose the correct answer from the options given below.
Multiple Choice Options
- A Both (A) and (R) are true and (R) is the correct explanation of (A).
- B Both (A) and (R) are true but (R) is not the correct explanation of (A).
- C (A) is true but (R) is false.
- D (A) is false but (R) is true.
Step-by-Step Verified Solution
Correct order of ionic radii:
O–2 > Mg+2
This is because among isoelectronic species, the size of anions are greater than the size of cations. Statement (II) is correct as both O–2 and Mg+2 are isoelectronic.
O–2 > Mg+2
This is because among isoelectronic species, the size of anions are greater than the size of cations. Statement (II) is correct as both O–2 and Mg+2 are isoelectronic.