CuCO_(3) was strongly heated to obtain a residue A and gas B. The residue obtained was treated with a salt of sodium 'X' and oxide Y, which produced a blue colored glassy compound C on heating in oxidising flame. The same combination of x and Y gave a green colored glassy compound D when Cr_(2)(SO_(4))_(3) was heated with them in oxidizing flame. Match the following accordingly :

CuCO_(3) was strongly heated to obtain a residue A and gas B. The resi

1.	CuCO_(3) was strongly heated to obtain a residue A and gas B. The residue obtained was treated with a salt of sodium 'X' and oxide Y, which produced a blue colored glassy compound C on heating in oxidising flame. The same combination of x and Y gave a green colored glassy compound D when Cr_(2)(SO_(4))_(3) was heated with them in oxidizing flame. Match the following accordingly :
Answer» SOLUTION :`CuCO_(3) overset(Delta)to underset((A))(CuO)darr+underset((B))(CO_(2))uarr` `CuO+underset("Borax bead")ubrace(overset((X))(NaBO_(2))+B_(2)O_(3))to underset((C )"Blue bead")ubrace(CU(BO_(2))_(2))+NaBO_(2)` `Cr_(2)(SO_(4))_(3) underset("Bead test")overset("Borax")to ` GREEN COLORED metaborate