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A coloured salt of cobalt is subjected to borax bead test. The transparent borax bead turns blue. From the given reaction, identify the one which does not take place during the processA. `4NaBO_(2) + CO_(2) rarr Na_(2)B_(4)O_(7) + Na_(2)CO_(3)`B. `Na_(2)B_(4)O_(7) rarr 2NaBO_(2) + B_(2)O_(3)`C. `Na_(2)[B_(4)O_(5)(OH)_(4)].8H_(2)O rarr Na_(2)B_(4)O_(7) + 10H_(2)O`D. `CoO + B_(2)O_(3) rarr Co(BO_(2))_(2)`

Answer» Correct Answer - A


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