Which of the following is not true for halogens ?A. All but fluorine show positive oxidation statesB. All are oxidising agentsC. All form monobasic oxyacidsD. Chlorine has the highest electron-gain enthalpy

Which of the following is not true for halogens ?A. All but fluorine s

1.	Which of the following is not true for halogens ?A. All but fluorine show positive oxidation statesB. All are oxidising agentsC. All form monobasic oxyacidsD. Chlorine has the highest electron-gain enthalpy
Answer» Correct Answer - A Fluorine is the most electronegative element and cannot exhibit any positive oxidation state. Other halogens have d-orbitals and therefore, can expand their octets and show `+1, +3, +5` and `+7` oxidation states. Thus, option (a) is incorrect.

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Which of the following is not true for halogens ?A. All but fluorine show positive oxidation statesB. All are oxidising agentsC. All form monobasic oxyacidsD. Chlorine has the highest electron-gain enthalpy

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