NEET 2018 Chemistry question

Which of the following statements is not true for halogens?

(1)All but fluorine show positive oxidation statesCorrect
(2)All are oxidizing agents
(3)All form monobasic oxyacids
(4)Chlorine has the highest electron-gain enthalpy

Answer: (1)

Solution

Fluorine, chlorine, bromine and iodine are all strong oxidising agents (statement 2 true), chlorine has the highest (most negative) electron-gain enthalpy of all elements, even higher in magnitude than fluorine, because of the small size and strong inter-electronic repulsion in the compact 2p subshell of fluorine

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Question ID VK-092244