When borax is heated with $CoO$ on a platinum loop, blue coloured bead formed is largely due to
When borax is heated with $CoO$ on a platinum loop, blue coloured bead formed is largely due to
- [JEE MAIN 2022]
- A
$B _{2} O _{3}$
- B
$Co \left( BO _{2}\right)_{2}$
- C
$CoB _{4} O _{7}$
- D
$Co [ B _{4} O _{5}( OH )_{4}]$
Similar Questions
Anhydrous $ALCl_3$ is covalent however,when it is dissolved in water hydrared ionic species are formed. This transformation is owing to
Anhydrous $ALCl_3$ is covalent however,when it is dissolved in water hydrared ionic species are formed. This transformation is owing to
Explain structures of diborane and boric acid.
Explain structures of diborane and boric acid.
When $B_2H_6 + NH_3(excess)$ at very high temperature $(> 200\,^oC$) is formed
When $B_2H_6 + NH_3(excess)$ at very high temperature $(> 200\,^oC$) is formed
A certain salt $X$, gives the following results.
$(i)$ Its aqueous solution is alkaline to litmus.
$(ii)$ It swells up to a glassy material $Y$ on strong heating.
$(iii)$ When conc. $H_2SO_4$ is added to a hot solution of $X$, white crystal of an acid $Z$ separates out.
Write equations for all the above reactions and identify $X, Y$ and $ Z$.
A certain salt $X$, gives the following results.
$(i)$ Its aqueous solution is alkaline to litmus.
$(ii)$ It swells up to a glassy material $Y$ on strong heating.
$(iii)$ When conc. $H_2SO_4$ is added to a hot solution of $X$, white crystal of an acid $Z$ separates out.
Write equations for all the above reactions and identify $X, Y$ and $ Z$.
Aluminium is a self-preserving metal, because
Aluminium is a self-preserving metal, because