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InterviewSolution
| 1. |
The correct formula of Borax is : (a) Na2B4O7⋅8H2O (b) Na2 [B4O5 (OH)4 ]⋅10H2O (c) Na2B4O7⋅4H2O (d) Na2 [B4O5 (OH)4 ]⋅8H2O |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (b) Na<sub>2</sub> [B<sub>4</sub>O<sub>5</sub> (OH)<sub>4</sub> ]⋅10H<sub>2</sub>O</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Borax (sodium tetraborate decahydrate) Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O. Borax occurs naturally as tincal. </span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Na<sub>2</sub>[B<sub>4</sub>O<sub>5</sub>(OH)<sub>4</sub>].8H<sub>2</sub>O = Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O</span></span></p> | |