The correct formula of borax is
$Na_2[B_4O_4(OH)_3].9 H_2O$
$Na_2[B_4O_5(OH)_4].8 H_2O$
$Na_2[B_4O_6(OH)_5].7 H_2O$
$Na_2[B_4O_7(OH)_6].6 H_2O$
Which of the following mineral does not contain aluminium?
In the following sets of reactants which two sets best exhibit the amphoteric characters of $Al_2O_3. xH_2O$ ?
Set $1$: $Al_2O_3 .xH_2O\, (s)$ and $OH^-(aq)$
Set $2$: $Al_2O_3 .xH_2O\, (s)$ and $H_2O\,(l)$
Set $3$: $Al_2O_3 .xH_2O\, (s)$ and $H^+(aq)$
Set $4$: $Al_2O_3 .xH_2O\, (s)$ and $NH_3(aq)$
Which of the following properties describes the diagooal relalionship between boron and silicon?
The stability of $+ 1$ oxidation state among $Al,Ga, In$ and $Tl$ increases in the sequence
Which is correct statement about Borax