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The green colour produced in the borax bead test of a chromium(III) salt is due to

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The green colour produced in the borax bead test of a chromium(III) salt is due to

(A) CrB 

(B) Cr2(B4O7)3 

(C) Cr(BO2)3 

(D) Cr2O3

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Best answer

Correct Option :- (C) Cr(BO2)3

Explanation :-

 In borax bead test, metal oxide reacts with glassy bead to form metaborates.

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