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Given below are two statements :
Statement $I :$ Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.
Statement $II :$ Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.
In the light of the above statements, choose the most appropriate answer from the options given below.
Statement $I$ is true but Statement $II$ is false
Both Statement $I$ and Statement $II$ are false
Statement $I$ is false but Statement $II$ is true
Both Statement $I$ and Statement $II$ are true
Solution
$(i)$ Blue cupric metaborate is reduced to colourless cuprous metaborate in a luminous flame
$\begin{array}{*{20}{c}} {2Cu{{\left( {B{O_2}} \right)}_2} + 2NaB{O_2} + C} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \downarrow \,{\text{Luminous flame}}} \\ {2CuB{O_2} + N{a_2}{B_4}{O_7} + CO} \end{array}$
$(ii)$ Cupric metaborate is obtained by heating boric anhydride and copper sulphate in a non luminous flame.
