Question

Which of the following is the incorrect statement?

• A. Electron gain enthalpy is defined as the energy change when an electron is added to an isolated gaseous atom
• B. Ionisation energy is minimum energy required to remove outermost electron of an isolated gaseous atom or molecules
• C. Metals have relative higher ionisation energy
• D. Electron gain enthalpy of halogen is highly negative

Answer 1

The correct option is C Metals have relative higher ionisation energy

Electron gain enthalpy is defined as the energy change when an electron is added to an isolated gaseous atom. During the addition of an electron, energy can either be released or absorbed.
Ionisation energy is minimum energy required to remove outermost electron of an isolated gaseous atom or molecules
Metals loose their electron most readily which reflect as their lower ionisation energy.
Elelctron gain enthalpy of halogen is highly negative because halogens need only electron to gain the stable configuration.