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NEET 2023
Exam
NEET
Year
2023
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

NEET 2023 · Chemistry · Classification of Elements and Periodicity in Properties

Given below are two statements : one is labelled as Assertion (A)...

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Ionisation enthalpy increases along each series of the transition elements from left to right. However, small variations occur. Reason (R) : There is corresponding increase in nuclear charge which accompanies the filling of electrons in the inner dorbitals. In the light of the above statements, choose the most appropriate answer from the options given below.

Options

  1. ABoth (A)(\mathbf{A}) and (R)\mathbf{( R )} are correct and (R)(\mathbf{R}) is the correct explanation of (A)(\mathbf{A})
  2. BBoth (A)(\mathbf{A}) and (R)(\mathbf{R}) are correct but (R)(\mathbf{R}) is not the correct explanation of (A)(\mathbf{A})
  3. C(A)(\mathbf{A}) is correct but (R) is not correct
  4. D(A) is not correct but (R) is correct

Correct answer

A. Both (A)(\mathbf{A}) and (R)\mathbf{( R )} are correct and (R)(\mathbf{R}) is the correct explanation of (A)(\mathbf{A})

Step-by-step solution

- Due to an increase in nuclear charge which accompanies the filling of the inner dd orbitals, there is an increase in ionisation enthalpy along each series of the transition elements, from left to right. However, many small variations occur.
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