An element 'E' has the ionisation enthalpy value of 374 kJ mol. 'E' reacts with elements A, B, C and D with electron gain enthalpy values of , , and kJ mol, respectively.

The correct order of the p

Question

An element 'E' has the ionisation enthalpy value of 374 kJ mol. 'E' reacts with elements A, B, C and D with electron gain enthalpy values of , ,  and  kJ mol, respectively.

The correct order of the products EA, EB, EC and ED in terms of ionic character is:

Canvas Classes · Accepted Answer

Strategy:
 Ionic character depends on the difference in electronegativity or the stability of the formed ions. A more negative Electron Gain Enthalpy () of the anion-former typically results in a more ionic bond.

Step 1: Rank the EGA values
- B:  (Most exothermic)
- A: 
- C: 
- D:  (Least exothermic)

Step 2: Conclusion
The element B, releasing the most energy, will form the most stable anion and thus the most ionic compound (). The order follows the  magnitude.
Order: .

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