MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
EDTA method for hardness determination is a less accurate and inconvenient procedure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
How many grams of MgCO3 dissolved per litre gives 84 ppm hardness? |
| A. | 70.56 mg/L |
| B. | 48.23 mg/L |
| C. | 81.49mg/L |
| D. | 66.12 mg/L |
| Answer» B. 48.23 mg/L | |
| 3. |
1 ppm = ____________ |
| A. | 0.07 0Fr |
| B. | 0.70Fr |
| C. | 0.10Fr |
| D. | 0.010Fr |
| Answer» D. 0.010Fr | |
| 4. |
1 degree Clarke = 1 part of CaCO3 per _____________ parts of water. |
| A. | 10,000 |
| B. | 30,000 |
| C. | 50,000 |
| D. | 70,000 |
| Answer» E. | |
| 5. |
The chemical equivalent of MgSO4 salt is ____________ |
| A. | 60 |
| B. | 47.5 |
| C. | 82 |
| D. | 68 |
| Answer» B. 47.5 | |
| 6. |
Hardness of water is conventionally expressed in terms of equivalent amount of ____________ |
| A. | H2CO3 |
| B. | MgCO3 |
| C. | CaCO3 |
| D. | Na2 CO3 |
| Answer» D. Na2 CO3 | |
| 7. |
Hardness of water is due to the presence of salts of ____________ |
| A. | Potassium |
| B. | Chlorine |
| C. | Magnesium |
| D. | Boron |
| Answer» D. Boron | |
| 8. |
1_DEGREE_CLARKE_=_1_PART_OF_CACO3_PER_______________PARTS_OF_WATER.?$ |
| A. | 10,000 |
| B. | 30,000 |
| C. | 50,000 |
| D. | 70,000 |
| Answer» E. | |
| 9. |
How many grams of MgCO3 dissolved per litre gives 84 ppm hardness? |
| A. | 70.56 mg/L |
| B. | 48.23 mg/L |
| C. | 81.49mg/L |
| D. | 66.12 mg/L |
| Answer» B. 48.23 mg/L | |
| 10. |
1_ppm_=$ |
| A. | 0.07 <sup>0</sup>Fr |
| B. | 0.7<sup>0</sup>Fr |
| C. | 0.1<sup>0</sup>Fr |
| D. | 0.01<sup>0</sup>Fr |
| Answer» D. 0.01<sup>0</sup>Fr | |
| 11. |
EDTA_method_for_hardness_determination_is_less_accurate_and_inconvenient_procedure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Which of the following is not a unit of hardness? |
| A. | Parts per million |
| B. | Degree centigrade |
| C. | Degree clarke |
| D. | Degree French |
| Answer» C. Degree clarke | |
| 13. |
The chemical equivalent of MgSO4 salt is |
| A. | 60 |
| B. | 47.5 |
| C. | 82 |
| D. | 68 |
| Answer» B. 47.5 | |
| 14. |
Hardness of water is conventionally expressed in terms of equivalent amount of |
| A. | H<sub>2</sub>CO<sub>3</sub> |
| B. | MgCO<sub>3</sub> |
| C. | CaCO<sub>3</sub> |
| D. | Na<sub>2</sub> CO<sub>3</sub> |
| Answer» D. Na<sub>2</sub> CO<sub>3</sub> | |
| 15. |
Alkaline hardness is due to the presence of bicarbonate, carbonate and hydroxides of the hardness-producing metal ions. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
Hardness of water is due to the presence of salts of |
| A. | Potassium |
| B. | Chlorine |
| C. | Magnesium |
| D. | Boron |
| Answer» D. Boron | |