Q.
Select the correct statement about ionization enthalpy
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a
It is highest for noble gas atom in every period.
b
It is the lowest for alkali metal in every period.
c
Down a group, it always decreases.
d
All are correct.
answer is D.
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Detailed Solution
Ionization potential increases across the period since effective nuclear charge increasesIonization potential decreases down to the group since availabilty of electron in the valence shell increases
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