Which one of the following statements is incorrect?

Question: Which one of the following statements is incorrect?

A. Greater the nuclear charge, more negative is the electron gain enthalpy.

B. Nitrogen has positive electron gain enthalpy.

C. Chlorine has highest electron gain enthalpy with negative sign.

D. Electron gain enthalpy decreases from fluorine to iodine in the group.

The incorrect statement is:

C. Chlorine has the highest electron gain enthalpy with a negative sign.

The correct information is that chlorine has the most negative electron gain enthalpy, but it is not the highest in absolute value. Fluorine actually has a higher (less negative) electron gain enthalpy than chlorine due to its small size and high electron-electron repulsion in its compact 2p orbital.

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