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JEE Mains 31-Jan-2023 Shift 2 Solved Paper

Section: Chemistry
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Question : 57 of 90
 
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The number of alkali metal(s), from Li,K,Cs,Rb having ionization enthalpy greater than 400‌kJ‌mol−1 and forming stable super oxide is ________.
[31-Jan-2023 Shift 2]
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