JEE Main 2015 Chemistry question

The least number of oxyacids are formed by:

(1)Chlorine
(2)FluorineCorrect
(3)Sulphur
(4)Nitrogen

Answer: (2)

Solution

Fluorine is the most electronegative element and has no accessible d-orbitals, so it cannot expand its octet or take a positive oxidation state. It forms only one oxyacid, hypofluorous acid HOF, and even that is unstable. Chlorine forms four (HOCl, , ,

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Question ID VK-115273