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 In the light of the above statements, choose the correct answer from the options given below :

Step-by-step solution

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 correct. Statement II: [Fe(H₂O)₆]³⁺ is an octahedral complex. In an octahedral crystal field, the d-orbitals split such that the t_ 2g set of orbitals ( d_ xy , d_ xz , d_ yz ) has lower energy than the e_g set of orbitals ( d_ x^2-y^2 , d_ z^2 ).