Analytical Chemistry Question 143
Question: In borax bead test, which of the following compound is formed
[CBSE PMT 2002]
Options:
A) Meta borate
B) Tetra borate
C) Double oxide
D) Ortho borate
Show Answer
Answer:
Correct Answer: A
Solution:
$ Na_2B_4O_7.10H_2O\xrightarrow[-10H_2O]{}Na_2B_4O_7 $
$ \xrightarrow{\Delta }2NaBO_2+B_2O_3 $
$ CuO+B_2O_3\to \underset{(\text{Copper meta borate blue)}}{\mathop{Cu{{(BO_2)}_2}}} $
BETA
