An element 'E' has the ionisation enthalpy value of 374 kJ mol-1. 'E' reacts with elements A, B, C and D with electron…
Classification of Elements & Periodicity · Class 11 · JEE Main Previous Year 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:
- a✓
- b
- c
- d
🧠 More exothermic EGE → more stable anion → more ionic compound Ionic character of a compound between E and a non-metal depends on how strongly the non-metal attracts the electron. A more negative EGE means the anion is more stable, and the bond is more ionic.
🗺️ Rank by EGE magnitude Element E has kJ/mol (very low — a highly electropositive metal, likely Cs or Rb).
- B: kJ/mol — most exothermic. Most stable anion. Most ionic compound (EB).
- A: kJ/mol.
- C: kJ/mol.
- D: kJ/mol — least exothermic. Least ionic.
Order of ionic character: .
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