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QJEEM23Chea59: JEE Main 2023 Chemistry - Class 11 JEEM23Chea59 Solution: The number of alkali metal(s), from , Rb having ionization…

The number of alkali metal(s), from Li,K,Cs\mathrm{Li}, \mathrm{K}, \mathrm{Cs} , Rb having ionization enthalpy greater than 400 kJ400 \mathrm{~kJ} mol−1\mathrm{mol}^{-1} and forming stable super oxide is _____________.

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JEE Main 2023 (Online) 31st January Evening Shift Chemistry - s-Block Elements Question 36 English Explanation

Li does not form superoxide.

K, Rb and Cs form stable super oxides but Cs has ionisation enthalpy less than 400 kJ. While K and Rb have ionisation enthalpy greater than 400 kJ mol–1.

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