| 1. | Magnesium metal is extracted from which ore? |
A. magnesite | |
B. dolomite | |
C. carnallite | |
D. kieserite |
| 2. | Which of the following metals burns with nitrogen |
A. sodium | |
B. calcium | |
C. magnesium | |
D. platinum |
| 3. | What is the main ingredient of an antacid marketed as milk of magnesia? |
A. MgCI₂ | |
B. MgCO₃ | |
C. Mg(OH)₂ | |
D. MgSO₄ |
| 4. | Which of the following is present in the chlorophyll molecule |
A. Mn | |
B. Mg | |
C. Fe | |
D. K |
| 5. | The chemical formula of Epsom salt is – |
A. ZnSO₄-7H₂O | |
B. Na₂SO₄ 10H₂O | |
C. Na₂CO₃-10H₂O | |
D. MgSO₄-7H₂O |
| 6. | The base used as antacid is |
A. calcium hydroxide | |
B. barium hydroxide | |
C. magnesium hydroxide | |
D. silver hydroxide |
| 7. | Which aluminum salt is generally used to stop bleeding? |
A. aluminum chloride | |
B. aluminum nitrate | |
C. Aluminum sulfate | |
D. potash alum |
| 8. | Which of the following compounds is used in making fireproof cloth? |
A. sodium sulfate | |
B. magnesium sulfate | |
C. Ferrous Sulphate | |
D. aluminum sulfate |
| 9. | Bauxite ore is – |
A. Of iron | |
B. of aluminum | |
C. of copper | |
D. Of gold |
| 10. | Aluminum is extracted from bauxite |
A. by Prabhaji Aswan | |
B. by electrolysis | |
C. by sublimation | |
D. by character writing |