Statement I : Second ionisation potential of alkali metals are higher than alkaline earths.Statement II : Unipositive alkali metal ions have stable configuration.

IA group IIA group   IA group to IIA group as the size decreases and hence Ionisation energy increases IE1 of alkaline earth metals > IE1 of alkalimetals→ But IE2 of alkalimetal > IE2 of alkaline earth metalsReasonIn alkali metals after losing one electron the formed M+ ion gets stable inert gas configuration, Therefore the  2nd Ionisation energy (IE2) is very high