A) Boron show only +3 oxidation state while other all show +1 as well as +3 oxidation state
B) Stability of +1 oxidation state decreases top to bottom along group 13
C) Compound of Ti (I) show great resembles with alkali metals
D) Aluminium trichloride occurs as dimeric structure
Correct Answer: B
Solution :
Stability of +1 oxidation state increases top to bottom due to inert pair effect. Which reluctant the participation of inner s electrons to participate in bond formation due to presence of electrons in deep.
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