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  4. Which of the following compound is formed in borax bead test

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Q. Which of the following compound is formed in borax bead test

NTA AbhyasNTA Abhyas 2020The p-Block Elements - Part2

Solution:

$Na_{2}B_{4}O_{7}.10H_{2}O\underset{- 10 \, H_{2} O}{ \rightarrow }Na_{2}B_{4}O_{7}\overset{\Delta }{ \rightarrow }2NaBO_{2}+B_{2}O_{3}$

$CuO + B _{2} O _{3} \rightarrow \underset{\text { (Copper meta borate blue) }}{ Cu \left( BO _{2}\right)_{2}}$