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JEE Mains · Chemistry · STD 12 - 4. d and f- block elements

Given below are two statements :
Statement I: Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation.
Statement II: \(d_{xy} = d_{xz} = d_{yz} < d_{x^2-y^2} = d_{z^2}\) and \(d_{x^2-y^2} = d_{z^2} < d_{xy} = d_{xz} = d_{yz}\) are the d-orbital splittings in \([Fe(H_2O)_6]^{3+}\) and \([Ni(Cl)_4]^{2-}\) complex ions respectively.
In the light of the above statements, choose the correct answer from the options given below :

  1. A Both Statement I and Statement II are correct
  2. B Both Statement I and Statement II are incorrect
  3. C Statement I is correct but Statement II is incorrect
  4. D Statement I is incorrect but Statement II is correct
Verified Solution

Answer & Solution

Correct Answer

(A) Both Statement I and Statement II are correct

Step-by-step Solution

Detailed explanation

Statement I: The enthalpy of atomisation of transition metals depends on the strength of metallic bonding. A greater number of unpaired electrons in the d-orbitals leads to stronger metallic bonding, which results in a higher enthalpy of atomisation. Thus, Statement I is…
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