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Question

Na2B4O7.10H2OHeat−−X+NaBO2+H2O

X+Cr2O3Heat−−YGreen colour
X and Y are:

A
Na3BO3 and Cr(BO2)3
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B
Na2B4O7 and Cr(BO2)3
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C
B2O3 and Cr(BO2)3
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D
B2O3 and CrBO3
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