MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Industry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which type of rotary dryer is used in manufacture of sodium tri polyphosphate? |
| A. | Rotary drum dryer |
| B. | Indirect fired and cooled rotary dryer |
| C. | Rotary vacuum dryers |
| D. | Direct rotary dryers |
| Answer» C. Rotary vacuum dryers | |
| 2. |
What ratio of Na2O/P2O5 is required to form of 1 mole of monosodium to 2 moles of disodium phosphate? |
| A. | 1.87 |
| B. | 1.62 |
| C. | 1.67 |
| D. | 1.82 |
| Answer» D. 1.82 | |
| 3. |
What is the molecular weight of Na5P3O10? |
| A. | 368 |
| B. | 363 |
| C. | 360 |
| D. | 365 |
| Answer» B. 363 | |
| 4. |
What is the chemical formula for sodium Tri polyphosphate? |
| A. | Na<sub>4</sub>P<sub>2</sub>O<sub>7</sub> |
| B. | Na<sub>3</sub>PO<sub>4</sub> |
| C. | NaPO<sub>3</sub> |
| D. | Na<sub>5</sub>P<sub>3</sub>O<sub>10</sub> |
| Answer» E. | |
| 5. |
Which one of the following is the structure of hexa Meta phosphate? X represents monovalent alkali metal. |
| A. | X<sub>5</sub>P<sub>3</sub>O<sub>10</sub> |
| B. | (XPO<sub>3</sub>)<sub>6</sub> |
| C. | PO<sub>4</sub><sup>-3</sup> |
| D. | X<sub>4</sub>P<sub>2</sub>O<sub>7</sub> YH<sub>2</sub> O |
| Answer» C. PO<sub>4</sub><sup>-3</sup> | |