Chemistry · p-Block Elements
First ionisation enthalpy (ΔiH1 kJ mol−1) for the elements of Group 13 follows the order:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1B > Al In < Tl✓
- 2B Ga Tl
- 3B < Al < Ga < In < Tl
- 4B > Al > Ga > In > Tl
Correct answer
B > Al In < Tl
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