The element which exists in liquid state for a wide range of temperature and can be used for measuring high temperature is :-
$B$
$Ga$
$Al$
$In$
In diborane, the two $H - B - H$ angles are nearly
Colour of the bead in borax bead test is mainly due to the formation of
Which of following salt does not give borax bead test
$BO_3$ unit in boric acid possess which type of bond ?
Boron forms $BX_3$ type of halides. The correct increasing order of Lewis-acid strength of these halides is