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  • The colour of cobalt metaborate is Option: 1 Blue Option: 2 Brown 

The colour of cobalt metaborate is 

Option: 1

Blue 


Option: 2

Brown 


Option: 3

Pink 


Option: 4

Red 


Answers (1)

best_answer

As we have learned

Borax Bead Test -

B2O3 on heating combines with a number of coloured transition metal oxides Co, Ni, Cr, Cu, Mn, etc. to form correspending metaborates which posses characteristic colour.

CoSO_{4}\overset{\Delta }{\rightarrow}CaO+SO_{3}

CoO+B_{2}O_{3}\rightarrow Co\left ( BO_{2} \right )_{2}

Cobalt metaborate formed is blue in colour 

Hence, the correct answer is Option (1)

Posted by

SANGALDEEP SINGH

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