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Which green coloured compound of chromium is formed in borax bead test ?

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Which green coloured compound of chromium is formed in borax bead test ?
A. `Cr(BO_(2))_(3)`
B. `Cr_(2)O_(3)`
C. `CrB`
D. `CrBO_(3)`
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`Na_(2)B_(4)O_(7).10H_(2)O overset(Delta)to NaB_(4)O_(7) overset(Delta)toNaBO_(2)+B_(2)O_(3)`
`Cr_(2)O_(3)+B_(2)O_(3)overset(Delta)to underset("Green")(Cr(BO_(2))_(3))`
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