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NEET CHEMISTRYStructure of AtomEasy

Question

A pair of d-orbitals having electron density along the axes is:

A

d_{z^2}, d_{xz}

B

d_{xz}, d_{zy}

C

d_{z^2}, d_{x^2-y^2}

D

d_{xy}, d_{x^2-y^2}

Step-by-Step Solution

The five dd-orbitals are classified into two sets based on their orientation relative to the coordinate axes:

  1. Axial Orbitals (ege_g set): The dx2−y2d_{x^2-y^2} and dz2d_{z^2} orbitals have their lobes (electron density) concentrated along the axes. Specifically, dx2−y2d_{x^2-y^2} lies along the x and y axes, and dz2d_{z^2} lies along the z-axis.
  2. Non-axial Orbitals (t2gt_{2g} set): The dxy,dyz,d_{xy}, d_{yz}, and dxzd_{xz} orbitals have their lobes oriented between the axes.

This distinction is crucial in Crystal Field Theory, where ligands approaching along the axes cause greater repulsion to the axial orbitals (dx2−y2,dz2d_{x^2-y^2}, d_{z^2}) compared to the non-axial ones.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Structure of Atom. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYStructure of Atomdorbitalshavingelectrondensity

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