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Per NCERT §4.2, IONIC bonds form most readily between elements with which combination of properties?
ABoth noble gases
BLow ionisation enthalpy (metal) + highly negative electron-gain enthalpy (non-metal)
CBoth highly electronegative
DBoth with high IE
Answer & Solution
Correct answer: B. Low ionisation enthalpy (metal) + highly negative electron-gain enthalpy (non-metal)
Per NCERT §4.2, ionic bond: low-IE metal donates e⁻; high-|EGH| non-metal accepts e⁻. Stabilised by lattice energy.
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