MCQOPTIONS
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MCQOPTIONS
| 1. |
To avoid trapped air produced by clay flocculation, we used ___ in distilled water. |
| A. | (NaPO<sub>3</sub>)<sub>6</sub> |
| B. | Na<sub>4</sub>P<sub>2</sub>O<sub>7</sub> |
| C. | Na<sub>5</sub>P<sub>3</sub>O<sub>10</sub> |
| D. | PO<sub>4</sub> |
| Answer» B. Na<sub>4</sub>P<sub>2</sub>O<sub>7</sub> | |