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Question

Which one of the following statements is incorrect?

A
Greater the nuclear charge, more negative is the electron gain enthalpy
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B
Nitrogen has positive electron gain enthalpy
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C
Electron gain enthalpy decreases from fluorine to iodine in the group
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D
Chlorine has highest electron gain enthalpy with negative sign
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Solution

The correct option is C Electron gain enthalpy decreases from fluorine to iodine in the group
As we move from fluorine to iodine, the magnitude of electron gain enthalpy first increases from F to Cl and then decreases regularly from Cl to I.

Always remember that electron gain enthalpy and electron affinity have opposite signs with the same magnitude.

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