Chemistry · 2023
JEE Main · 31 January 2023, Shift 2 · Q58
The number of alkali metal(s), from Li, K, Cs, Rb having ionization enthalpy greater than 400 kJ mol^-1 and forming stable super oxide is ____.
The number of alkali metal(s), from $\displaystyle \mathrm{Li}, \mathrm{K}, \mathrm{Cs}, \mathrm{Rb}$ having ionization enthalpy greater than $\displaystyle 400$ kJ $\displaystyle \mathrm{mol}^{-1}$ and forming stable super oxide is $\displaystyle \_\_\_\_$.
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