Explain physical and chemical properties of borax.
The stability of $+ 1$ oxidation state among $Al,Ga, In$ and $Tl$ increases in the sequence
$N{a_2}{B_4}{O_7}.10{H_2}O \xrightarrow{\Delta } X + NaB{O_2} + {H_2}O$
$X + C{r_2}{O_3}\xrightarrow{\Delta }Y$ (Green coloured)
$X$ and $Y$ are
${H_3}B{O_3} + {H_2}O_2 \to {H_2}O + 'X' {\xrightarrow{{NAOH}} }{'Y'}$
Which of the following statements is $/$ are Correct for $'Y'$
Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because