The green colour produced in the borax bead test of a chromium$(III)$ salt is due to formation of______:
The green colour produced in the borax bead test of a chromium$(III)$ salt is due to formation of______:
- [IIT 2019]
- A
$Cr \left( BO _2\right)_3$
- B
$CrB$
- C
$Cr _2\left( B _4 O _7\right)_3$
- D
$Cr _2 O _3$
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- [NEET 2017]
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