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Question

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. of N>I.P. of Cl due to half filled configuration of N.
(B) E.A. of Cl> E.A. of F due to high ee repulsion in F.
(C) I.P. of Be>I.P. of B due to filled ns2 configuration of Be.
(D) E.N. of F>E.N. of Cl.

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