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Elements of Group 13, 14 and 15 — Chemistry STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 ScienceChemistryElements of Group 13, 14 and 151 Mark
Question
Give the molecular formula of crystalline borax.
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Answer

The crystalline borax has formula $Na_2B_4O_7.10H_2O$  or $Na_2[B_4O_5(OH)_4].8H_2O.$

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