The correct order of the first ionization enthalpy is (A) Al > Ga > Tl (B) Ga > Al > B (C) B > Al > — JEE Mains Chemistry Past Papers Chemistry Question
Question
The correct order of the first ionization enthalpy is (A) Al > Ga > Tl (B) Ga > Al > B (C) B > Al > Ga (D) Tl > Ga > Al
Answer: D
💡 Solution & Explanation
(i) due to lanthanide contraction T has more I.E. as compared to Ga and A (ii) due to scandide contraction Ga has more I.E. as compared to A
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