In which one of the following molecules the central atom does not have sp³ hybridization?

Options

(a) NH₄⁺
(b) CH₄
(c) SF₄
(d) BF₄⁻

Correct Answer:

SF₄

Explanation:

NH₄⁺, CH₄, BF₄⁻ : sp³ – hybridization, SF₄ : sp³d – hybridization. Correct choice (c).