How many different types of $OBO$ angles are there in sodium peroxoborate ?
$2$
$3$
$5$
$1$
The chemical name of borax is
Give important trends and anomalous properties of boron.
Give uses of boron and its compound.
The gaseous product $(s)$ expected at room temperature by reaction of sodium borohydride and boron trifluoride under anhydrous conditions is/are:
The element which exists in liquid state for a wide range of temperature and can be used for measuring high temperature is :-