The coloured bead produced when borax is heated with Cu in an oxidizing flame is:

greenish

No worries! We‘ve got your back. Try BYJU‘S free classes today!

green when hot & blue when cold

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

yellow

No worries! We‘ve got your back. Try BYJU‘S free classes today!

red

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B green when hot & blue when cold
The coloured metaborate $C u (B O_{2})_{2}$ formed when borax is heated with Cu is green when hot and blue when cold.

Suggest Corrections

Similar questions

C u^{2 +}

C u^{2 +}

N a_{2} B_{4} O_{7} Δ \to 2 N a B O_{2} + B_{2} O_{3}

B_{2} O_{3} + C u O \to C u (B O_{2})_{2}

C u (B O_{2})_{2}

Join BYJU'S Learning Program