Student Bio Data
1. Which of the following exists as a diatomic molecule?
2. The molecular formula of ammonia is:
3. Water has the formula H₂O. This means:
4. Which element is NOT a diatomic molecule at room temperature?
5. The formula of methane is:
6. Sulfuric acid has the formula:
7. How many atoms are present in NH₃?
8. Which shows a molecule made of one carbon atom and four hydrogen atoms?
9. The formula of chlorine gas is:
10. A molecule of H₂SO₄ contains how many oxygen atoms?
11. Which compound contains a total of 5 atoms?
12. In which of the following do atoms share electrons?
13. Which diagram correctly shows water’s structure?
14. The molecular formula for oxygen is:
15. A compound with 2 carbon atoms and 6 hydrogen atoms is:
16. Sodium ion has a charge of:
17. The charge on a sulfate ion (SO₄) is:
18. The formula of calcium chloride is:
19. Which compound is formed when Mg²⁺ reacts with OH⁻?
20. The formula of ammonium sulfate is:
21. What is the formula of iron(III) chloride?
22. Copper(II) sulfate has the formula:
23. Which pair forms an ionic compound?
24. Which is a polyatomic ion?
25. The correct formula for aluminium oxide is:
26. The formula of sodium carbonate is:
27. Which is the formula of sulfur trioxide?
28. Carbon dioxide has the formula:
29. How many oxygen atoms are in Ca(OH)₂?
30. The correct formula for potassium nitrate is:
31. Sodium hydroxide has the formula:
32. Which ion has a positive charge?
33. Limestone is mainly composed of:
34. The formula of sodium sulfate is:
35. The formula of silver nitrate is:
36. Hydrochloric acid has the formula:
37. Zinc oxide has the formula:
38. The formula of barium chloride is:
39. Nitric acid has the formula:
40. Which compound is a base?
41. Common salt has the formula:
42. The molecular formula for hydrogen gas is:
43. How many nitrogen atoms are in N₂O₅?
44. The formula of slaked lime is:
45. Sodium oxide has the formula:
46. The formula for potassium oxide is:
47. How many oxygen atoms are in Al₂(SO₄)₃?
48. Chalk is mainly composed of:
49. The formula of water is:
50. Baking soda is chemically known as:
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