JEE Advanced Chemistry question

Which of the underlined atoms in oxyacids have sp3 hybridised atoms?

(A)HClO4, H2SO4, HNO2
(B)H2SO4, H3PO4, HNO3
(C)HClO4, H2SO4, H2SO5Correct
(D)HClO4, HNO3, HClO3

Answer: (C)

Solution

In HClO4, H2SO4 and H2SO5, the central atom (Cl or S) is bonded to four oxygen-based groups with no π-system requiring planarity, giving genuine sp3 hybridisation (tetrahedral electron geometry) in every case. By contrast, nitrogen in HNO2 and HNO3 is sp2

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Question ID VK-159429