TS EAMCET 4 May 2018 Shift 1 Solved Paper

The hybridization of the orthoboric acid is sp2 which represents three bonds with three hydroxyl group on the same plane which gives rise to its planar geometry.
The BCl ‌3 is non polar molecule of symmetrical distribution of electrons and forms the bond with mathrm‌NH3 molecule which gives rise to the tetrahedral geometry.