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CGP EDU Academic Team
Published on: August 12, 2026
Which of the following compound is formed in borax bead test ?
Text Solution
Verified by ExpertsThe correct answer is:
B
Na 2 B 4 O 7 .10H 2 O 
Na 2 B 4 O 7 + 10H 2 O ; Na 2 B 4 O 7 
2NaBO 2 + B 2 O 3
CuO + B 2 O 3 
Cu(BO 2 ) 2 (copper (II) metaborate) - red and opaque bead in oxidising flame.
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