Arrange 
in increasing order of ionisation potential.
Text Solution
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The ionization potential of 
and 
are less than their respective non ionic forms, i.e. 
and 
respectively. Also fluorine has its valence electron in 
orbital while chlorine has in 
so there is more atomic force of attraction in fluorine than chlorine, therefore, the ionization potential of fluorine, is more than chlorine. But the ionization potential of 
is less than 
as, repulsion occurs in case of 
thus electrons can easily be remove from it as compared to 
. Hence, the overall increasing order of ionization potential is 
.
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