Consider SO3, SO3^2-, SO4^2-, NO3-, NH2-, CO3^2- and ClO3-. How many of them have an sp^3 hybridised central atom?

JEE Advanced levelSingle correct optionDifficulty 3 of 3cb077

Consider $SO X_{3}$ , $SO X_{3} X^{2 -}$ , $SO X_{4} X^{2 -}$ , $NO X_{3} X^{-}$ , $NH X_{2} X^{-}$ , $CO X_{3} X^{2 -}$ and $ClO X_{3} X^{-}$ . How many of them have an $s p^{3}$ hybridised central atom?

Count electron domains.

SO X_{3} X^{2 -}

(3 bonds + 1 lone pair),

SO X_{4} X^{2 -}

(4 bonds),

NH X_{2} X^{-}

(2 bonds + 2 lone pairs) and

ClO X_{3} X^{-}

(3 bonds + 1 lone pair) each have four domains (

s p^{3}

SO X_{3}

NO X_{3} X^{-}

and

CO X_{3} X^{2 -}

have three (

s p^{2}

). The count is 4.