Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : Size of Bk\(^{3+}\) ion is less than Np\(^{3+}\) 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 Bk\(^{3+}\) ion is less than Np\(^{3+}\) 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 :
Show Hint
- Both A and B are true and R is the correct explanation of A
- A is false but R is true
- A is true but R is false
- Both A and B are true but R is not the correct explanation of A
The Correct Option is C
Solution and Explanation
The reason cited is the lanthanoid contraction, which refers to the 4f series (Ce to Lu). The size trend among actinoids is due to the actinoid contraction, so Reason R is false.
A is true, R is false.
Answer: (3) A is true but R is false
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