Set of Chemistry CEE-6
Posted by Set of Chemistry CEE-6
1. What is the atomic number of carbon?
a) 6
b) 12
c) 8
d) 14
2. Which of the following is the correct electron configuration for neon (Ne)?
a) 1s² 2s² 2p²
b) 1s² 2s² 2p⁶
c) 1s² 2s² 2p⁴
d) 1s² 2s² 2p³
3. Which of the following has the highest electronegativity?
a) Lithium
b) Oxygen
c) Fluorine
d) Nitrogen
4. Which of the following acids is commonly found in vinegar?
a) Sulfuric acid
b) Acetic acid
c) Hydrochloric acid
d) Nitric acid
5. Which of the following is a typical property of ionic compounds?
a) They are soft and can be easily cut
b) They have low melting and boiling points
c) They conduct electricity in molten state
d) They are poor conductors of electricity in water
6. What is the formula for magnesium sulfate?
a) MgSO3
b) MgSO4
c) MgS
d) Mg2SO4
7. Which of the following is a noble gas?
a) Nitrogen
b) Chlorine
c) Argon
d) Oxygen
8. What is the chemical formula of ammonium chloride?
a) NH3Cl
b) NH4Cl
c) NCl
d) NH4Cl2
9. What is the oxidation number of phosphorus in P4O10?
a) +5
b) -3
c) +3
d) +2
10. Which of the following gases is used in the preparation of soda water?
a) Nitrogen
b) Carbon dioxide
c) Oxygen
d) Hydrogen
11. Which of the following compounds is a base?
a) HCl
b) NaOH
c) H2SO4
d) CH3COOH
12. The bond formed between sodium and chlorine in sodium chloride is:
a) Covalent
b) Ionic
c) Metallic
d) Polar covalent
13. Which of the following is the correct name for Na2CO3?
a) Sodium carbonate
b) Sodium bicarbonate
c) Sodium acetate
d) Sodium oxide
14. The reaction between an acid and a metal usually produces:
a) Water and salt
b) Hydrogen gas
c) Oxygen gas
d) Carbon dioxide gas
15. The gas used in balloons is:
a) Hydrogen
b) Helium
c) Oxygen
d) Nitrogen
16. Which of the following molecules has a tetrahedral shape?
a) CO2
b) CH4
c) H2O
d) NH3
17. The pH of pure water is:
a) 7
b) 1
c) 10
d) 14
18. Which of the following is a characteristic of a chemical reaction?
a) It involves the rearrangement of atoms
b) It changes the physical state of a substance only
c) It involves a physical change
d) It involves a change in only the color of the substance
19. Which of the following is an example of a redox reaction?
a) NaCl → Na + Cl2
b) HCl + NaOH → NaCl + H2O
c) H2 + O2 → H2O
d) H2O → H2 + O2
20. Which of the following has the highest ionization energy?
a) Sodium
b) Magnesium
c) Neon
d) Oxygen
21. Which of the following is an example of a non-polar molecule?
a) H2O
b) NH3
c) CO2
d) CH3Cl
22. What is the molar mass of water (H2O)?
a) 12 g/mol
b) 18 g/mol
c) 22 g/mol
d) 36 g/mol
23. Which of the following compounds contains both ionic and covalent bonds?
a) NaCl
b) NH3
c) NaOH
d) NaHCO3
24. Which of the following compounds is an example of an allotrope of carbon?
a) Sulfur dioxide
b) Diamond
c) Water
d) Sodium chloride
25. Which of the following is the best conductor of electricity?
a) Solid sodium chloride
b) Liquid sodium chloride
c) Solid copper
d) Copper sulfate solution
26. The process of changing a solid directly into a gas is known as:
a) Sublimation
b) Melting
c) Condensation
d) Freezing
27. Which of the following gases is used in the process of photosynthesis?
a) Nitrogen
b) Oxygen
c) Carbon dioxide
d) Hydrogen
28. Which of the following is a strong electrolyte?
a) Glucose
b) Sodium chloride
c) Acetic acid
d) Ammonia
29. Which of the following is true about a catalyst?
a) It is consumed in the reaction
b) It speeds up the reaction
c) It raises the activation energy
d) It is always a gas
30. Which of the following reactions is exothermic?
a) Melting ice
b) Evaporation of water
c) Combustion of methane
d) Dissolution of sodium chloride in water
31. Which of the following ions is responsible for the green color in the flame test?
a) Sodium (Na⁺)
b) Potassium (K⁺)
c) Copper (Cu²⁺)
d) Calcium (Ca²⁺)
32. Which of the following substances is a good conductor of electricity?
a) Sulfur
b) Water
c) Copper
d) Sugar
33. Which of the following elements is an alkali metal?
a) Sodium
b) Magnesium
c) Chlorine
d) Iron
34. What is the name of the compound with the formula K2SO4?
a) Potassium sulfate
b) Potassium sulfite
c) Potassium sulfate
d) Potassium bisulfate
35. Which of the following compounds is formed by the reaction of an acid with a base?
a) Salt and water
b) Carbon dioxide and water
c) Hydrogen and oxygen
d) Metal and acid
36. Which of the following substances is a strong acid?
a) Acetic acid
b) Hydrochloric acid
c) Phosphoric acid
d) Citric acid
37. What is the unit of pressure in the SI system?
a) Atmosphere
b) Pascal
c) Bar
d) Torr
38. Which of the following is a property of metals?
a) They are brittle
b) They are poor conductors of electricity
c) They are malleable and ductile
d) They have low melting points
39. Which of the following ions will be responsible for the acidic nature of a solution?
a) OH⁻
b) H⁺
c) Na⁺
d) Cl⁻
40. Which of the following has the greatest atomic radius?
a) Sodium
b) Magnesium
c) Calcium
d) Barium
41. What is the name of the compound with the formula Al2O3?
a) Aluminum oxide
b) Aluminum hydroxide
c) Aluminum sulfate
d) Aluminum phosphate
42. Which of the following is an example of a homogeneous mixture?
a) Sand and water
b) Oil and water
c) Air
d) Salt and pepper
43. Which of the following is a type of radiation that can penetrate the human body?
a) Alpha radiation
b) Beta radiation
c) Gamma radiation
d) X-ray radiation
44. The term "molarity" refers to:
a) Mass of solute per volume of solvent
b) Number of moles of solute per volume of solution
c) Number of particles per volume of solution
d) Mass of solute per mass of solution
45. Which of the following is the main source of energy for nuclear reactors?
a
) Uranium-238
b) Hydrogen
c) Oxygen
d) Coal
46. What is the color of a flame produced when copper compounds are burned?
a) Green
b) Red
c) Yellow
d) Blue
47. What is the chemical formula for hydrogen peroxide?
a) H2O2
b) H2O
c) O2H2
d) H2O3
48. Which of the following compounds has a trigonal planar shape?
a) NH3
b) CO2
c) CH4
d) BF3
49. What is the most common oxidation state of iron in compounds?
a) +1
b) +2
c) +3
d) +4
50. What is the most abundant element in the Earth's crust?
a) Iron
b) Oxygen
c) Silicon
d) Aluminum
Answer Key:
- a) 6
- b) 1s² 2s² 2p⁶
- c) Fluorine
- b) Acetic acid
- c) They conduct electricity in molten state
- b) MgSO4
- c) Argon
- b) NH4Cl
- a) +5
- b) Carbon dioxide
- b) NaOH
- b) Ionic
- a) Sodium carbonate
- b) Hydrogen gas
- b) Helium
- b) CH4
- a) 7
- a) It involves the rearrangement of atoms
- c) H2 + O2 → H2O
- c) Neon
- c) CO2
- b) 18 g/mol
- d) NaHCO3
- b) Diamond
- b) Liquid sodium chloride
- a) Sublimation
- c) Carbon dioxide
- b) Sodium chloride
- b) It speeds up the reaction
- c) Combustion of methane
- c) Copper (Cu²⁺)
- c) Copper
- a) Sodium
- a) Potassium sulfate
- a) Salt and water
- b) Hydrochloric acid
- b) Pascal
- c) They are malleable and ductile
- b) H⁺
- d) Barium
- a) Aluminum oxide
- c) Air
- c) Gamma radiation
- b) Number of moles of solute per volume of solution
- a) Uranium-238
- a) Green
- a) H2O2
- d) BF3
- b) +2
- b) Oxygen
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