11.2 How can you explain higher stability of as compared to ?
Both boron and Thallium belong to the 13th group of the periodic table. We know that the stability of lower oxidation state (+1) is increases down the group. Thus is more stable than . It is due to the +3 of Boron is more stable than +3 of Thallium. is highly oxidising in nature it reverts back to its +1 oxidation state by gaining an electron.