Multiple choice

+2 oxidation state is generaly not observed in alkali metals because of

  1. high first ionisation enthalpy.

  2. low first ionisation enthalpy

  3. low second ionisation enthalpy

  4. high second ionisation enthalpy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

this option is correct because in alkali metals when one elctron is detached from the outermost shell then it acquires noble gas configuration resuting in large second ionisation enthalpy and hence it does not show +2 oxidation state.

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