State with equation what happens when borax is heated on a platinum wire loop and to the results tranparent mass, a minute of CuOis added and the mixture is again heated first in oxidisingflame and then in the reducingflame of a Bunsen burner ?

State with equation what happens when borax is heated on a platinum wi

1.	State with equation what happens when borax is heated on a platinum wire loop and to the results tranparent mass, a minute of CuOis added and the mixture is again heated first in oxidisingflame and then in the reducingflame of a Bunsen burner ?
Answer» Solution :Whenborax is HEATED on a platinumwire loop. Atransparent glassy beadis heated with `CuO` in the oxidisingflame,it impartsblue colour to the beaddue tothe formationof cupricmetaborate `CuO + B_(2)O_(3) OVERSET("Oxidising flame")rarr underset("CUPRIC metaborate(blue)")(Cu (BO_(2))_(2))` However, when cupric metaborate is heatedin the reducing flame of the Bunsen burner, the blue cupric metaborate isreducedby carbonpresent in the flamefirst to colourless currous metaborate and the then to metal andproduces red scales. `{:(underset(("blue"))underset("Cupric metaborate")(2Cu(BO_(2))_(2))+Crarrunderset(("colourless"))underset("Cuprous metaborate")(2CuBO_(2))+B_(2)O_(3)+CO),(2CuBO_(2) + C rarr underset(("red"))underset("COPPER metal")(Cu)+B_(2)O_(3)+CO):}`