MCQOPTIONS
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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 formed when amphoteric oxides react with an alkali solution? |
| A. | Salt only |
| B. | No reaction |
| C. | Acid |
| D. | Salt and water |
| Answer» E. | |
| 2. |
Which of the following metals does not react with hot water to form an oxide? |
| A. | Calcium |
| B. | Magnesium |
| C. | Iron |
| D. | Lithium |
| Answer» D. Lithium | |
| 3. |
Which of the following processes involves heating a carbonate ore to form metal oxide? |
| A. | Leaching |
| B. | Smelting |
| C. | Ore Reduction |
| D. | Calcination |
| Answer» E. | |
| 4. |
What product is formed when iron metal is dipped into concentrated nitric acid? |
| A. | Iron (III) nitrate + NO2 |
| B. | Iron (II) nitrate + NO |
| C. | Iron (III) oxide |
| D. | Iron (III) nitrite |
| Answer» D. Iron (III) nitrite | |
| 5. |
Before subjecting Mg ribbons to flame, it is rubbed with sandpaper. Why? |
| A. | To increase surface area for combustion |
| B. | To increase roughness of surface |
| C. | To remove oxide layer |
| D. | To remove moisture |
| Answer» D. To remove moisture | |
| 6. |
What is the primary constituent of sand? |
| A. | Silicon tetroxide |
| B. | Silica |
| C. | Silicon |
| D. | Feldspar |
| Answer» C. Silicon | |
| 7. |
What is the starting substance fed into the electrolytic cell in Hall-Heroult process? |
| A. | Cryolite |
| B. | Sodium hydroxide |
| C. | Aluminum hydroxide |
| D. | Alumina |
| Answer» E. | |
| 8. |
Which of the following can classified as an amphoteric oxide? |
| A. | Iron (III) oxide |
| B. | Zinc oxide |
| C. | Mercury (II) oxide |
| D. | Lime |
| Answer» C. Mercury (II) oxide | |
| 9. |
What type of oxides is formed by non-metals? |
| A. | Oxides with pH <=7 |
| B. | Amphoteric oxides |
| C. | Oxides with pH > 7 |
| D. | Oxides which are acidic |
| Answer» E. | |
| 10. |
What type of oxides is formed by metals? |
| A. | Oxides with pH = 7 |
| B. | Oxides with pH > -log10[1 x 10-7] |
| C. | Oxides with pH <= -log10[1 x 10-7] |
| D. | Amphoteric oxides |
| Answer» C. Oxides with pH <= -log10[1 x 10-7] | |