Question

Which of the following is most basic?

• A. Tl2O3
• B. Tl2O2
• C. Cr2O3
• D. B2O3

Answer 1

Answer: (B)

Tl2O2

Answer 2

The correct option is (B): $Tl_2O_2$
Tl+ oxide is more basic than $Tl_3$+ $Cr_2O_3$ is amphoteric.