IGNOU MCH 11 2026 2027 - Give the second postulate of VSEPR theory. Predict at the struct

Question

Give the second postulate of VSEPR theory. Predict at the structure of the molecule
sulfur tetrafluoride with the help of VSEPR theory. Draw the structure.

13 Aug 2026

Answer :

Word Count : 352

The second postulate of VSEPR (Valence Shell Electron Pair Repulsion) theory states that electron pairs present in the valence shell of the central atom repel one another because they have negative charge. They arrange themselves as far apart as possible so that the repulsion between them is minimum and the molecule becomes more stable. The magnitude of repulsion follows the order: Lone pair–lone pair > lone pair–bond pair > bond pair–bond pair. Sulfur tetrafluoride, SF₄, consists of one sulfur atom surrounded by four fluorine atoms. Sulfur has six valence electrons, while each fluorine has seven valence electrons. In SF₄, sulfur forms four S–F single bonds and retains one lone pair of electrons. Thus, there are five electron pairs (five electron

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