The molecule in which an atom is associated with more than 8 electrons is known as hypervalent molecule and less than 8 electrons is known as hypovalent molecule. All hypervalent molecules must have p

Question

The molecule in which an atom is associated with more than 8 electrons is known 
as hypervalent molecule and less than 8 electrons is known as hypovalent 
molecule. All hypervalent molecules must have p$\pi$-d$\pi$ bonding but the 
molecules having back bonding need not to have always p$\pi$-d$\pi$ bonding.

Prashant Kotian · Accepted Answer

Correct answer: C. Step 1: Understand that the potential energy of a bonding system reaches a minimum at the optimum internuclear distance (bond length), balancing attractions and repulsions. Step 2: If the internuclear distance is decreased below this optimum distance, the nuclei and core electron clouds are forced too close together. Step 3: This leads to a massive, steep increase in potential energy due to the sharp increase in electrostatic repulsions between the positively charged nuclei and between the negatively charged electron clouds.

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