Which of the following is an amphoteric oxide
$MgO$
$A{l_2}{O_3}$
$C{l_2}{O_7}$
$T{i_2}{O_2}$
(b)$A{l_2}{O_3}$ is an amphoteric oxide.
Given below are two statements :
Statement $I:$ Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green.
Statement $II:$ The green colour observed is due to the formation of copper(I) metaborate.
In the light of the above statements, choose the most appropriate answer from the options given below :
How would you explain the lower atomic radius of $Ga$ as compared to $Al$?
Anhydrous $ALCl_3$ is covalent however,when it is dissolved in water hydrared ionic species are formed. This transformation is owing to
The formation of molecular complex $BF_3 – NH_3$ results in a change in hybridization of boron
Which of the following compounds of boron does not exist in the free form
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