Which one of the following is an incorrect statement?
A
The ionisation potential of nitrogen is greater than that of chlorine
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B
The electron affinity of fluorine is greater than that of chlorine
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C
The ionisation potential of beryllium is greater than that of boron
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D
The electronegativity of fluorine is greater than that of chlorine
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Solution
The correct option is B The electron affinity of fluorine is greater than that of chlorine (A) I.P.ofN>I.P.ofCl due to half filled configuration of N.
(B) E.A.ofCl>E.A.ofF due to high e−e− repulsion in F.
(C) I.P.ofBe>I.P.ofB due to filled ns2 configuration of Be.
(D) E.N.ofF>E.N.ofCl.