Chemistry - Salt Analysis Question with Solution | TestHub

Borax bead test
${\text{Na}}_{\text{2}}{\text{B}}_{\text{4}}{\text{O}}_{\text{7}}{\text{.10H}}_{\text{2}}\text{O\hspace{0.17em}}\stackrel{\Delta }{\to }{\text{Na}}_{\text{2}}{\text{B}}_{\text{4}}{\text{O}}_{\text{7}}\stackrel{\Delta }{\to }{\text{NaBO}}_{\text{2}}+{\text{B}}_{\text{2}}{\text{O}}_{\text{3}}$
$C{r}_2{O}_3+B_2{O}_3\hspace{0.17em}{\stackrel{\Delta }{\to }}_{Green coloured}^{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}Cr(B{O}_2{)}_3}$