MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the role of the rotating paddle in froth floatation? |
| A. | Enhances wettability of gangue particles |
| B. | Stabilizes the froth |
| C. | Draws in air causing frothing |
| D. | Enhances non-wettability of the ore particles |
| Answer» D. Enhances non-wettability of the ore particles | |
| 2. |
Which of the following are collectors used in the froth floatation process? |
| A. | Aniline |
| B. | Pine oil |
| C. | Ethyl xanthate |
| D. | Potassium ethyl xanthates |
| Answer» B. Pine oil | |
| 3. |
What is the property of necessary for an ore to be concentrated by electrostatic separation? |
| A. | The ore particles should be heavier than the gangue particles |
| B. | The ore particles should be magnetic in nature |
| C. | The ores should conduct electricity |
| D. | It should be a sulphide ore |
| Answer» D. It should be a sulphide ore | |
| 4. |
Where are the magnetic particles collected in concentration by electromagnetic separation? |
| A. | Below the magnetic roller |
| B. | Above the magnetic roller |
| C. | Away from the magnetic roller |
| D. | On the conveyer belt |
| Answer» B. Above the magnetic roller | |
| 5. |
Which of the following cannot be concentrated by electromagnetic separation? |
| A. | Chromite |
| B. | Magnetite |
| C. | Pyrolusite |
| D. | Zinc blende |
| Answer» E. | |
| 6. |
Which of the following ores cannot be concentrated by hydraulic washing? |
| A. | Haematite |
| B. | Pyrolusite |
| C. | Tinstone |
| D. | Native ores of silver |
| Answer» C. Tinstone | |
| 7. |
Ores obtained from the Earth s crust are always pure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Which of the following equipment is used for concentration by hydraulic washing? |
| A. | Stamp mill |
| B. | Ball mill |
| C. | Wilfley tables |
| D. | Magnetic roller |
| Answer» D. Magnetic roller | |
| 9. |
Which of the cases is suitable for concentration by hand picking? |
| A. | When either the ore or the impurities are magnetic |
| B. | When the ore particles are heavier than the impurities |
| C. | When the ores are good conductors of electricity |
| D. | When the impurities can be distinguished from the ore by the naked eye |
| Answer» E. | |
| 10. |
Concentration of ores is also known as ore-dressing. |
| A. | True |
| B. | False |
| Answer» B. False | |