Question

Explain VSEPR Theory​

Answer 1

Answer:

VSEPR theory is used to predict the arrangement of electron pairs around central atoms in molecules, especially simple and symmetric molecules. A central atom is defined in this theory as an atom which is bonded to two or more other atoms, while a terminal atom is bonded to only one other atom.

Answer 2

This Theory given by Sidgwick and Powell in 1940 but developed or improved by Gillespie and Nyholm in 1957

According to this Theory “ If a Molecules central atom present only bonding electron so geometry of Molecules is definite but Molecules present both bonding and Non-bonding electron so geometry of Molecules is changed ”.

$\mathtt{ \gray{For\: Example} }\dashrightarrow$

• Molecules of $\sf{CH_{4}, NH_{3} and H_{2}O}$ have SP³ Hybridisation but $\sf{CH_{4}}$ present only bonding electron so it's structure is tetrahedral but molecules of $\sf{NH_{3} \: and \: H_{2}0}$ have bonding and Non-bonding electron so it's structure is changed Pyramided and Opposite V shape.