1. What is the atomic number of carbon?
a) 6
b) 12
c) 14
d) 16
Answer: a) 6
2. Which of the following elements is a noble gas?
a) Nitrogen
b) Oxygen
c) Helium
d) Fluorine
Answer: c) Helium
3. What is the chemical symbol for gold?
a) Au
b) Ag
c) Fe
d) Cu
Answer: a) Au
4. Which of the following is a halogen?
a) Sodium
b) Chlorine
c) Calcium
d) Potassium
Answer: b) Chlorine
5. What is the formula for sodium chloride?
a) NaCl
b) NaOH
c) Na2CO3
d) NaNO3
Answer: a) NaCl
6. Which of the following is an alkali metal?
a) Calcium
b) Lithium
c) Iron
d) Aluminum
Answer: b) Lithium
7. What is the chemical formula for water?
a) H2O2
b) CO2
c) H2O
d) CH4
Answer: c) H2O
8. What is the pH of a neutral solution?
a) 0
b) 7
c) 14
d) -7
Answer: b) 7
9. Which of the following is a transition metal?
a) Potassium
b) Zinc
c) Sodium
d) Magnesium
Answer: b) Zinc
10. What is the chemical formula for methane?
a) CO2
b) CH4
c) H2O
d) NH3
Answer: b) CH4
11. What is the chemical formula for sulfuric acid?
a) HCl
b) H2SO4
c) HNO3
d) H3PO4
Answer: b) H2SO4
12. Which of the following is a greenhouse gas?
a) Oxygen (O2)
b) Carbon dioxide (CO2)
c) Nitrogen (N2)
d) Hydrogen (H2)
Answer: b) Carbon dioxide (CO2)
13. What is the chemical symbol for iron?
a) Ir
b) Fe
c) Au
d) Ag
Answer: b) Fe
14. What is the chemical formula for ammonia?
a) NH3
b) N2
c) NH4Cl
d) H2SO4
Answer: a) NH3
15. Which of the following is a noble gas?
a) Oxygen (O2)
b) Neon (Ne)
c) Hydrogen (H2)
d) Nitrogen (N2)
Answer: b) Neon (Ne)
16. What is the chemical formula for hydrogen peroxide?
a) H2O
b) H2O2
c) HOCl
d) HCl
Answer: b) H2O2
17. Which of the following is a non-metal?
a) Sodium (Na)
b) Silicon (Si)
c) Calcium (Ca)
d) Potassium (K)
Answer: b) Silicon (Si)
18. What is the chemical symbol for potassium?
a) K
b) P
c) Ca
d) Na
Answer: a) K
19. Which of the following is a strong acid?
a) Acetic acid
b) Hydrochloric acid
c) Citric acid
d) Carbonic acid
Answer: b) Hydrochloric acid
20. What is the chemical formula for carbon dioxide?
a) CO
b) CO2
c) C2O
d) CO3
Answer: b) CO2
21. What is the atomic number of oxygen?
a) 6
b) 8
c) 12
d) 16
Answer: b) 8
22. Which of the following is a transition metal?
a) Zinc (Zn)
b) Sodium (Na)
c) Calcium (Ca)
d) Magnesium (Mg)
Answer: a) Zinc (Zn)
23. What is the chemical formula for hydrochloric acid?
a) H2SO4
b) HCl
c) HNO3
d) H3PO4
Answer: b) HCl
24. Which of the following is a compound?
a) Oxygen (O2)
b) Nitrogen (N2)
c) Carbon dioxide (CO2)
d) Neon (Ne)
Answer: c) Carbon dioxide (CO2)
25. What is the chemical symbol for helium?
a) He
b) H
c) N
d) Ne
Answer: a) He
26. Which of the following is a halogen?
a) Sodium (Na)
b) Chlorine (Cl)
c) Calcium (Ca)
d) Magnesium (Mg)
Answer: b) Chlorine (Cl)
27. What is the chemical formula for table salt?
a) NaCl
b) NaOH
c) HCl
d) KOH
Answer: a) NaCl
28. Which of the following is a noble gas?
a) Nitrogen (N2)
b) Helium (He)
c) Hydrogen (H2)
d) Carbon dioxide (CO2)
Answer: b) Helium (He)
29. What is the atomic number of nitrogen?
a) 5
b) 6
c) 7
d) 8
Answer: c) 7
30. Which of the following is a strong base?
a) Acetic acid
b) Sodium hydroxide
c) Citric acid
d) Carbonic acid
Answer: b) Sodium hydroxide
31. What is the chemical symbol for silver?
a) Ag
b) Au
c) Pt
d) Al
Answer: a) Ag
32. Which of the following is a compound?
a) Helium (He)
b) Nitrogen (N2)
c) Oxygen (O2)
d) Hydrogen (H2)
Answer: b) Nitrogen (N2)
33. What is the chemical formula for sulfur dioxide?
a) SO
b) SO2
c) S2O
d) SO3
Answer: b) SO2
34. Which of the following is a metalloid?
a) Carbon (C)
b) Silicon (Si)
c) Aluminum (Al)
d) Sodium (Na)
Answer: b) Silicon (Si)
35. What is the chemical formula for hydrogen sulfide?
a) H2S
b) HS2
c) SH2
d) H2SO3
Answer: a) H2S
36. Which of the following is a noble gas?
a) Oxygen (O2)
b) Nitrogen (N2)
c) Helium (He)
d) Carbon dioxide (CO2)
Answer: c) Helium (He)
37. What is the atomic number of potassium?
a) 18
b) 25
c) 39
d) 52
Answer: c) 39
38. What is the chemical symbol for mercury?
a) Hg
b) Mg
c) Fe
d) Co
Answer: a) Hg
39. Which of the following is a strong acid?
a) Acetic acid
b) Hydrochloric acid
c) Carbonic acid
d) Citric acid
Answer: b) Hydrochloric acid
40. What is the chemical formula for hydrofluoric acid?
a) HF
b) HCl
c) H2SO4
d) HNO3
Answer: a) HF
41. Which of the following is a metal?
a) Carbon (C)
b) Oxygen (O)
c) Iron (Fe)
d) Sulfur (S)
Answer: c) Iron (Fe)
42. What is the chemical formula for sodium bicarbonate?
a) NaHCO3
b) NaOH
c) NaCl
d) Na2CO3
Answer: a) NaHCO3
43. Which of the following is a strong base?
a) Acetic acid
b) Sodium hydroxide
c) Ammonia
d) Carbonic acid
Answer: b) Sodium hydroxide
44. What is the chemical formula for nitric acid?
a) HNO2
b) HNO3
c) H2SO4
d) HCl
Answer: b) HNO3
45. Which of the following is a diatomic molecule?
a) Carbon dioxide (CO2)
b) Oxygen (O2)
c) Methane (CH4)
d) Water (H2O)
Answer: b) Oxygen (O2)
46. What is the chemical symbol for copper?
a) Co
b) Cu
c) Cr
d) Cs
Answer: b) Cu
47. Which of the following is a halogen?
a) Sodium (Na)
b) Chlorine (Cl)
c) Calcium (Ca)
d) Magnesium (Mg)
Answer: b) Chlorine (Cl)
48. What is the chemical formula for phosphoric acid?
a) HCl
b) H2SO4
c) H3PO4
d) HNO3
Answer: c) H3PO4
49. Which of the following is a non-metal?
a) Sodium (Na)
b) Aluminum (Al)
c) Calcium (Ca)
d) Carbon (C)
Answer: d) Carbon (C)
50. What is the chemical symbol for sodium?
a) So
b) Na
c) Sn
d) Sd
Answer: b) Na
51. What is the chemical formula for sulfuric acid?
a) H2SO4
b) HCl
c) HNO3
d) H3PO4
Answer: a) H2SO4
52. Which of the following is a transition metal?
a) Zinc (Zn)
b) Sodium (Na)
c) Calcium (Ca)
d) Iron (Fe)
Answer: d) Iron (Fe)
53. What is the chemical formula for hydrochloric acid?
a) HCl
b) H2SO4
c) HNO3
d) H3PO4
Answer: a) HCl
54. Which of the following is a diatomic molecule?
a) Carbon monoxide (CO)
b) Oxygen (O2)
c) Methane (CH4)
d) Water (H2O)
Answer: b) Oxygen (O2)
55. What is the chemical symbol for potassium?
a) K
b) Ca
c) Cu
d) Ag
Answer: a) K
56. Which of the following is a noble gas?
a) Neon (Ne)
b) Fluorine (F)
c) Chlorine (Cl)
d) Sodium (Na)
Answer: a) Neon (Ne)
57. What is the chemical formula for hydrobromic acid?
a) HBr
b) HCl
c) H2SO4
d) HNO3
Answer: a) HBr
58. Which of the following is a metal?
a) Carbon (C)
b) Oxygen (O)
c) Copper (Cu)
d) Sulfur (S)
Answer: c) Copper (Cu)
59. What is the chemical symbol for lead?
a) Ld
b) Pb
c) Pl
d) Pt
Answer: b) Pb
60. Which of the following is a strong base?
a) Ammonia (NH3)
b) Sodium hydroxide (NaOH)
c) Acetic acid (CH3COOH)
d) Carbonic acid (H2CO3)
Answer: b) Sodium hydroxide (NaOH)
61. What is the chemical formula for acetic acid?
a) HCl
b) CH3COOH
c) H2SO4
d) HNO3
Answer: b) CH3COOH
62. Which of the following is a metalloid?
a) Aluminum (Al)
b) Silicon (Si)
c) Sodium (Na)
d) Potassium (K)
Answer: b) Silicon (Si)
63. What is the chemical symbol for tin?
a) Ti
b) Tn
c) Sn
d) St
Answer: c) Sn
64. Which of the following is a strong acid?
a) Nitric acid
b) Acetic acid
c) Sulfuric acid
d) Carbonic acid
Answer: c) Sulfuric acid
65. What is the chemical formula for nitrous acid?
a) HNO2
b) HNO3
c) H2SO4
d) HCl
Answer: a) HNO2
66. Which of the following is a non-metal?
a) Calcium (Ca)
b) Iron (Fe)
c) Hydrogen (H)
d) Sodium (Na)
Answer: c) Hydrogen (H)
67. What is the chemical symbol for chromium?
a) Cr
b) Ch
c) Cn
d) Cp
Answer: a) Cr
68. Which of the following is a diatomic molecule?
a) Carbon dioxide (CO2)
b) Oxygen (O2)
c) Methane (CH4)
d) Water (H2O)
Answer: b) Oxygen (O2)
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