Which of the following is incorrect?

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An element which has high electronegativity , always has higher electron gain enthalpy

Electron gain enthalpy is the property of an isolated gaseous atom

Electronegativity is the property of bonded atom

Both electronegativity and electron gain enthalpy are generally directly related to nuclear charge and inversely related to atomic size.

answer is A.

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Detailed Solution

High electronegativity elements always have high electron gain enthalpies. Elements with a high electronegativity typically have very negative affinities and large ionisation potentials, making them nonmetals and electrical insulators that tend to gain electrons in chemical reactions. Both electronegativity and electron gain enthalpy are typically directly related to nuclear charge and inversely related to atomic size (i.e., they are oxidants).

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