MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 percentage of Earth’s mass is sulfur? |
| A. | 3% |
| B. | 5% |
| C. | 0.032% |
| D. | 2% |
| Answer» B. 5% | |
| 2. |
Who first recognized sulfur as an element? |
| A. | John Dalton |
| B. | Humphry Davy |
| C. | Louis Pasteur |
| D. | Antoine Lavoisier |
| Answer» E. | |
| 3. |
What is the common name of O2SCl2? |
| A. | Sulfur oxochloride |
| B. | Sulfuryl dioxo-dichloride |
| C. | Sulfuryl chloride |
| D. | Thionyl chloride |
| Answer» D. Thionyl chloride | |
| 4. |
What is the oxidation number of sulfur in dithionous acid? |
| A. | -3 |
| B. | +3 |
| C. | +6 |
| D. | -6 |
| Answer» C. +6 | |
| 5. |
What is the name of the process of extracting sulfur on commercial scale? |
| A. | Bosch process |
| B. | Boyle process |
| C. | Ostwald process |
| D. | Frasch process |
| Answer» E. | |
| 6. |
Which of the following is used for vulcanization purposes in the rubber industry? |
| A. | Sulfuric acid |
| B. | Sulfur dioxide |
| C. | Sulfur |
| D. | Sulfur trioxide |
| Answer» D. Sulfur trioxide | |
| 7. |
When a flask containing sodium thiosulfate is placed over a paper marked with ‘X’ and HCl added to it, the ‘X’ seems to disappear when looked through the flask. Why? |
| A. | Because of formation of sodium chloride |
| B. | Because of sulfur precipitating |
| C. | Because of release of yellowish chlorine gas |
| D. | Because of dissolution of sulfur |
| Answer» C. Because of release of yellowish chlorine gas | |
| 8. |
What are pyrites known as fool’s good? |
| A. | Because of sulfides |
| B. | Because of lead |
| C. | Because of carbonates |
| D. | Because of iron |
| Answer» B. Because of lead | |
| 9. |
Which is a more vital source of elemental sulfur? |
| A. | Oceans |
| B. | Wind |
| C. | Soil |
| D. | Volcanoes |
| Answer» E. | |
| 10. |
What is the transition temperature of alpha- and beta-sulfur? |
| A. | 369 °C |
| B. | 369 °F |
| C. | 95.9 °C |
| D. | 95.9 °F |
| Answer» D. 95.9 °F | |
| 11. |
Which characteristic of crude petroleum is a consequence of sulfur? |
| A. | Acidity |
| B. | Sourness |
| C. | Alkalinity |
| D. | Foul odor |
| Answer» C. Alkalinity | |
| 12. |
What is the chemical structure and formula of sulfur? |
| A. | S8, S |
| B. | S, S8 |
| C. | S, S |
| D. | S8, S8 |
| Answer» B. S, S8 | |