The IUPAC name of the following compound is :

The decreasing order of bond angles in BF₃, NH₃, PF₃ and I₃^- is :

N₂O₅ decomposes to NO₂ and O₂ and follows first order kinetics. After 50 minutes, the pressure inside the vessel increases from 50 mmHg to 87.5 mmHg. The pressure of the gaseous mixture after 100 minute at constant temperature will be :

Identify the pair in which the geometry of the species is $$T$$-shape and square - pyraidal, respectively :