TS EAMCET Medical 29 Sept 2020 Shift 1 Paper

An unknown inorganic compound “A” on reduction with LiAIH4 produced a hydride product “B” (along with other by-products). The product “B” contains 21.72% of hydrogen in it. The product “B” on exposure to air gave boron trioxide. The compounds “A” and “B” are