Explanation
Hydrolysis of superoxide gives oxygen, H2O2 and hydroxide 2KO2 + 2H2O → 2KOH + H2O2 + O2
NaOH + Cl- →NaCl + OH-
Hence among the given, I and II are correct.
Due to the presence of loosely held valence electrons which are free to move throughout the metal structure. The alkali metals are good conductors of heat and electricity. Ionic conductivity increases from top to bottom in the order:
Li+ < Na+ < K+ < Rb+ <Cs+
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