First slide

Atomic and physical properties

Question

Statement I : Al is more electro positive than Tl.
Statement II : Al₂O₃ is more basic than Tl₂O.

Moderate

A

Both Statements are true
B

Statement I is true Statement II is false
C

Statement I is false and Statement II is true
D

Both Statements are false

Solution

Electronegativity order : B > Tl > In > Ga > Al
Electropositivity order : B < Tl < In < Ga < Al
Electropositivity order $\propto$ Metallic nature
Al₂O₃ is amphoteric oxide.
→ Tl⁺¹oxidation is more stable.Therefore Tl⁺¹ compounds are more similar to that of I_A group compounds. I_A group oxides and hydroxides are basic in nature and hence Tl(OH) and Tl₂O are also basic in nature.
Hence basic strength order : Tl₂O > Al₂O₃

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