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JEE Advance - Chemistry Hindi (2019 - Paper 1 Offline - No. 2)
क्रोमियम(III) लवण के सुहागा-मनका परीक्षण (borax bead test) में हरे रंग का कारण है
Cr
2
O
3
CrB
Cr(BO
2
)
3
Cr
2
(B
4
O
7
)
3
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