Verified Solution • 2025–26 Session
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QJEEM21Chc67d: JEE Main 2021 Chemistry - Class 12 JEEM21Chc67d Solution: Given below are two statement : one is labelled as Assertion A…
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : Size of Bk3+ ion is less than Np3+ ion.
Reason R : The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below :
Assertion A : Size of Bk3+ ion is less than Np3+ ion.
Reason R : The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below :
Multiple Choice Options
- A Both A and B 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 B are true but R is not the correct explanation of A
Step-by-Step Verified Solution
Size of Bk3+ is 98 pm
Size of Np3+ is 101 pm
So size of Np3+ is more than Bk3+ ion.
there is a gradual decrease in the size of M3+ ions across the series. This may be referred to as the actinoid contraction.
Size of Np3+ is 101 pm
So size of Np3+ is more than Bk3+ ion.
there is a gradual decrease in the size of M3+ ions across the series. This may be referred to as the actinoid contraction.