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 :

Question

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 : (A) A is false but R is true (B) Both A and R are true but R is not the correct explanation of A (C) Both A and Rare true and R is the correct explanation of A (D) A is true but R is false

Tardigrade Admin · Accepted Answer

Size of 97Bk3+ ion is less than that of 93Np3+ due to actinoid contraction. As we know that in a period from left to right ionic radius decreases and in actinide series it is due to actinoid contraction.

$A$ is false but $R$ is true

Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$

Both $A$ and $R$ are true and $R$ is the correct explanation of $A$

$A$ is true but $R$ is false

Size of $_{97} B k^{3 +}$ ion is less than that of $_{93} N p^{3 +}$ due to actinoid contraction. As we know that in a period from left to right ionic radius decreases and in actinide series it is due to actinoid contraction.

A is false but R is true

Both A and R are true but R is not the correct explanation of A

Both A and Rare true and R is the correct explanation of A

A is true but R is false

Size of 97​Bk3+ ion is less than that of 93​Np3+ due to actinoid contraction. As we know that in a period from left to right ionic radius decreases and in actinide series it is due to actinoid contraction.

$A$ is false but $R$ is true

Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$

Both $A$ and $R$ are true and $R$ is the correct explanation of $A$

$A$ is true but $R$ is false

Size of $_{97} B k^{3 +}$ ion is less than that of $_{93} N p^{3 +}$ due to actinoid contraction. As we know that in a period from left to right ionic radius decreases and in actinide series it is due to actinoid contraction.