Amongst SF_{4},XeF_{4},CF_{4} and H_{2}O,the | vedclass

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(A) To determine the number of lone pairs on the central atom:$1$. $SF_{4}$: Sulfur $(S)$ has $6$ valence electrons. It forms $4$ bonds with $F$ atoms

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$2$

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(A) To determine the number of lone pairs on the central atom:$1$. $SF_{4}$: Sulfur $(S)$ has $6$ valence electrons. It forms $4$ bonds with $F$ atoms,leaving $1$ lone pair on $S$.$2$. $XeF_{4}$: Xenon $(Xe)$ has $8$ valence electrons. It forms $4$ bonds with $F$ atoms,leaving $2$ lone pairs on $Xe$.$3$. $CF_{4}$: Carbon $(C)$ has $4$ valence electrons. It forms $4$ bonds with $F$ atoms,leaving $0$ lone pairs on $C$.$4$. $H_{2}O$: Oxygen $(O)$ has $6$ valence electrons. It forms $2$ bonds with $H$ atoms,leaving $2$ lone pairs on $O$.Thus,$XeF_{4}$ and $H_{2}O$ have $2$ lone pairs on their central atoms.The total number of such species is $2$.

Amongst $SF_{4}$,$XeF_{4}$,$CF_{4}$ and $H_{2}O$,the number of species with two lone pairs of electrons on the central atom is $.....$ .

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