- 1. Inorganic chemistry is the branch of chemistry that deals with inorganic compounds, which are substances that do not contain carbon-hydrogen (C-H) bonds. It focuses on the properties and behavior of inorganic compounds, including metals, minerals, and organometallic compounds. Inorganic chemistry plays a crucial role in various fields such as materials science, environmental science, medicine, and industry. It involves the study of the structure, properties, reactions, and uses of inorganic compounds, providing insights into the fundamental aspects of chemical bonding and reactivity in non-carbon-based systems.
What is the atomic number of carbon?
A) 4
B) 6
C) 10
D) 8
- 2. Which of the following elements is a noble gas?
A) Helium
B) Iron
C) Sulfur
D) Potassium
- 3. What is the chemical symbol for gold?
A) Cu
B) Ag
C) Au
D) Pt
- 4. How many electrons does oxygen have?
A) 4
B) 6
C) 10
D) 8
- 5. What is the atomic number of sodium?
A) 10
B) 12
C) 11
D) 13
- 6. Which element has the symbol Fe?
A) Gold
B) Silver
C) Titanium
D) Iron
- 7. What is the formula for calcium chloride?
A) AlCl3
B) NaCl
C) MgCl2
D) CaCl2
- 8. What is the formula for carbon dioxide?
A) CO2
B) CO
C) C2O3
D) C2O
- 9. What is the charge of a chloride ion?
A) -1
B) +1
C) +2
D) -2
- 10. Which of the following is an alkali metal?
A) Lithium
B) Iron
C) Nickel
D) Calcium
- 11. What is the atomic symbol for potassium?
A) Kt
B) Ks
C) K
D) Ka
- 12. How many valence electrons does nitrogen have?
A) 5
B) 3
C) 4
D) 6
- 13. What is the formula for water?
A) HO2
B) O2H
C) H3O
D) H2O
- 14. Which element has the chemical symbol Pb?
A) Lead
B) Polonium
C) Lithium
D) Plutonium
- 15. What is the atomic number of iron?
A) 24
B) 28
C) 30
D) 26
- 16. What is the formula for ammonia?
A) NH3
B) NO2
C) H2O
D) N2
- 17. What is the chemical symbol for silver?
A) Au
B) Pt
C) Ag
D) Cu
- 18. What is the atomic symbol for sodium?
A) So
B) Na2
C) No
D) Na
- 19. What is the formula for table salt?
A) NH3
B) NaCl
C) H2O
D) CO2
- 20. How many valence electrons does carbon have?
A) 6
B) 8
C) 4
D) 2
- 21. What is the chemical symbol for iron?
A) Ir
B) Fe
C) I
D) In
- 22. Which element has the highest electronegativity?
A) Fluorine
B) Oxygen
C) Chlorine
D) Nitrogen
- 23. What is the formula for sulfuric acid?
A) H2O
B) SO2
C) HSO4
D) H2SO4
- 24. The study of ions and their compounds is known as:
A) Organic chemistry
B) Inorganic chemistry
C) Physical chemistry
D) Analytical chemistry
- 25. What is the name of the process where a solid turns into a gas?
A) Fusion
B) Sublimation
C) Condensation
D) Evaporation
- 26. What is the primary component of Earth's atmosphere?
A) Carbon dioxide
B) Nitrogen
C) Oxygen
D) Argon
- 27. The process of forming an ionic bond involves:
A) Sharing of electrons
B) Gaining of protons
C) Loss of neutrons
D) Transfer of electrons
- 28. A substance that speeds up a chemical reaction without being consumed itself is called a:
A) Reactant
B) Reagent
C) Solvent
D) Catalyst
- 29. What is the common name for H2O2?
A) Hydrogen peroxide
B) Sulfuric acid
C) Hydrochloric acid
D) Carbon dioxide
- 30. Which element has an atomic number of 1?
A) Oxygen
B) Carbon
C) Helium
D) Hydrogen
- 31. The process of splitting water into hydrogen and oxygen using electricity is called:
A) Photolysis
B) Combustion
C) Electrolysis
D) Hydrolysis
- 32. Which subatomic particle has a positive charge?
A) Electron
B) Proton
C) Neutron
D) Photon
- 33. What is the formula for magnesium oxide?
A) MgSO4
B) MgCO3
C) MgCl2
D) MgO
- 34. The study of the rates of chemical reactions falls under the branch of chemistry known as:
A) Chemical kinetics
B) Thermochemistry
C) Quantum chemistry
D) Solid-state chemistry
- 35. What is the main component of vinegar?
A) Acetic acid
B) Nitric acid
C) Sulfuric acid
D) Hydrochloric acid
- 36. The compound Na2CO3 is known as:
A) Sodium hydroxide
B) Sodium chloride
C) Sodium carbonate
D) Sodium bicarbonate
- 37. The process by which a gas changes into a liquid is called:
A) Evaporation
B) Condensation
C) Freezing
D) Sublimation
- 38. How many electrons can the first energy level of an atom hold?
A) 4
B) 8
C) 2
D) 6
- 39. Which element is the most abundant in the Earth's crust?
A) Aluminum
B) Iron
C) Oxygen
D) Silicon
- 40. What is the chemical symbol for mercury?
A) He
B) Me
C) Hg
D) Mg
- 41. How many electrons does a neutral atom of chlorine have?
A) 18
B) 20
C) 17
D) 16
- 42. What is the chemical symbol for lead?
A) Pd
B) Pl
C) Pr
D) Pb
- 43. How many electrons are in the outer shell of a neutral sodium atom?
A) 1
B) 3
C) 4
D) 2
- 44. Which element is a halogen?
A) Bromine
B) Potassium
C) Magnesium
D) Sodium
- 45. Which of the following elements is a metalloid?
A) Boron
B) Aluminum
C) Magnesium
D) Potassium
- 46. How many valence electrons does chlorine have?
A) 8
B) 6
C) 7
D) 9
- 47. Which of the following is a transition metal?
A) Zinc
B) Lead
C) Tin
D) Copper
- 48. Which element is essential for human bone health?
A) Zinc
B) Calcium
C) Magnesium
D) Iron
- 49. Which of the following is a non-metal?
A) Phosphorus
B) Copper
C) Silver
D) Gold
- 50. What is the symbol for the element with atomic number 29?
A) Ag
B) Fe
C) Au
D) Cu
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