The atomic number of an element is determined by the number of:
a) Protons
b) Electrons
c) Neutrons
d) Protons and neutrons
Answer: a) Protons
An atom that has gained or lost electrons is called a/an:
a) Ion
b) Isotope
c) Element
d) Molecule
Answer: a) Ion
The mass number of an atom is determined by the number of:
a) Protons
b) Electrons
c) Neutrons
d) Protons and neutrons
Answer: d) Protons and neutrons
The periodic table is arranged in order of increasing:
a) Atomic number
b) Atomic mass
c) Electronegativity
d) Ionization energy
Answer: a) Atomic number
An element with the electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ is in which period of the periodic table?
a) Period 3
b) Period 4
c) Period 5
d) Period 6
Answer: b) Period 4
The group number of an element in the periodic table represents the number of:
a) Protons
b) Electrons
c) Neutrons
d) Valence electrons
Answer: d) Valence electrons
The vertical columns in the periodic table are called:
a) Periods
b) Groups
c) Blocks
d) Families
Answer: b) Groups
The horizontal rows in the periodic table are called:
a) Periods
b) Groups
c) Blocks
d) Families
Answer: a) Periods
Which of the following elements is an alkali metal?
a) Sodium (Na)
b) Calcium (Ca)
c) Chlorine (Cl)
d) Iron (Fe)
Answer: a) Sodium (Na)
Which of the following elements is a halogen?
a) Sodium (Na)
b) Calcium (Ca)
c) Chlorine (Cl)
d) Iron (Fe)
Answer: c) Chlorine (Cl)
The oxidation state of oxygen in most compounds is:
a) +1
b) -1
c) 0
d) +2
Answer: b) -1
The general formula for an alkane is:
a) CₙH₂ₙ
b) CₙH₂ₙ₊₁
c) CₙH₂ₙ₊₂
d) CₙHₙ
Answer: b) CₙH₂ₙ₊₁
Which of the following elements is a transition metal?
a) Sodium (Na)
b) Calcium (Ca)
c) Iron (Fe)
d) Oxygen (O)
Answer: c) Iron (Fe)
The process of converting a metal into its oxide is called:
a) Reduction
b) Oxidation
c) Combustion
d) Hydrolysis
Answer: b) Oxidation
The reaction between an acid and a base to form a salt and water is called:
a) Substitution reaction
b) Combination reaction
c) Neutralization reaction
d) Displacement reaction
Answer: c) Neutralization reaction
Which of the following is a strong acid?
a) Acetic acid (CH₃COOH)
b) Hydrochloric acid (HCl)
c) Nitric acid (HNO₃)
d) Carbonic acid (H₂CO₃)
Answer: b) Hydrochloric acid (HCl)
The process of splitting a compound into its constituent elements by the passage of an electric current is called:
a) Electrolysis
b) Precipitation
c) Decantation
d) Filtration
Answer: a) Electrolysis
Which of the following is an example of a redox reaction?
a) Acid-base neutralization
b) Precipitation reaction
c) Combustion reaction
d) Hydrolysis reaction
Answer: c) Combustion reaction
The process of adding oxygen to a substance is called:
a) Reduction
b) Oxidation
c) Combustion
d) Hydrolysis
Answer: b) Oxidation
Which of the following is an example of a displacement reaction?
a) Acid-base neutralization
b) Precipitation reaction
c) Combustion reaction
d) Reaction between zinc and hydrochloric acid
Answer: d) Reaction between zinc and hydrochloric acid
The process of removing oxygen from a substance is called:
a) Reduction
b) Oxidation
c) Combustion
d) Hydrolysis
Answer: a) Reduction
The general formula for an alkene is:
a) CₙH₂ₙ
b) CₙH₂ₙ₊₁
c) CₙH₂ₙ₊₂
d) CₙHₙ
Answer: a) CₙH₂ₙ
The general formula for an alkyne is:
a) CₙH₂ₙ
b) CₙH₂ₙ₊₁
c) CₙH₂ₙ₊₂
d) CₙHₙ
Answer: c) CₙH₂ₙ₊₂
The reaction between an acid and a metal to form a salt and hydrogen gas is called:
a) Acid-base neutralization
b) Precipitation reaction
c) Displacement reaction
d) Combustion reaction
Answer: c) Displacement reaction
The reaction between an acid and an oxide to form a salt and water is called:
a) Acid-base neutralization
b) Precipitation reaction
c) Displacement reaction
d) Hydrolysis reaction
Answer: a) Acid-base neutralization
The reaction between an acid and a carbonate to form a salt, water, and carbon dioxide gas is called:
a) Acid-base neutralization
b) Precipitation reaction
c) Displacement reaction
d) Decomposition reaction
Answer: d) Decomposition reaction
The reaction between an acid and a hydroxide to form a salt and water is called:
a) Acid-base neutralization
b) Precipitation reaction
c) Displacement reaction
d) Hydrolysis reaction
Answer: a) Acid-base neutralization
The reaction between an acid and a salt to form a new acid and a new salt is called:
a) Acid-base neutralization
b) Precipitation reaction
c) Displacement reaction
d) Hydrolysis reaction
Answer: a) Acid-base neutralization
The process of combining two or more substances to form a new substance is called:
a) Decomposition
b) Combination
c) Displacement
d) Neutralization
Answer: b) Combination
The process of breaking down a compound into simpler substances is called:
a) Decomposition
b) Combination
c) Displacement
d) Neutralization
Answer: a) Decomposition
The reaction between a metal and an acid to form a salt and hydrogen gas is an example of:
a) Decomposition reaction
b) Combination reaction
c) Displacement reaction
d) Neutralization reaction
Answer: c) Displacement reaction
The reaction between a metal and oxygen to form a metal oxide is an example of:
a) Decomposition reaction
b) Combination reaction
c) Displacement reaction
d) Oxidation reaction
Answer: d) Oxidation reaction
The reaction between an acid and a base to form a salt and water is an example of:
a) Decomposition reaction
b) Combination reaction
c) Displacement reaction
d) Neutralization reaction
Answer: d) Neutralization reaction
The reaction between a metal and a non-metal to form an ionic compound is an example of:
a) Decomposition reaction
b) Combination reaction
c) Displacement reaction
d) Neutralization reaction
Answer: b) Combination reaction
The reaction between a metal and a non-metal to form a covalent compound is an example of:
a) Decomposition reaction
b) Combination reaction
c) Displacement reaction
d) Neutralization reaction
Answer: b) Combination reaction
The process of adding water to a substance is called:
a) Oxidation
b) Reduction
c) Hydrolysis
d) Electrolysis
Answer: c) Hydrolysis
The process of separating a soluble solid from a liquid by evaporating the liquid and collecting the solid residue is called:
a) Filtration
b) Distillation
c) Decantation
d) Crystallization
Answer: d) Crystallization
The process of removing water of crystallization from a hydrated compound by heating is called:
a) Filtration
b) Distillation
c) Decantation
d) Calcination
Answer: d) Calcination
The process of converting a liquid into a gas by heating and condensing the vapor is called:
a) Filtration
b) Distillation
c) Decantation
d) Crystallization
Answer: b) Distillation
The process of separating a mixture of solids based on the difference in their solubilities in a solvent is called:
a) Filtration
b) Distillation
c) Decantation
d) Fractional crystallization
Answer: d) Fractional crystallization
The process of separating a mixture of liquids based on their different boiling points is called:
a) Filtration
b) Distillation
c) Decantation
d) Fractional crystallization
Answer: b) Distillation
The process of separating a mixture of liquids based on their different solubilities in a solvent is called:
a) Filtration
b) Distillation
c) Decantation
d) Chromatography
Answer: d) Chromatography
The process of separating a mixture of solids based on their different particle sizes using a porous material is called:
a) Filtration
b) Distillation
c) Decantation
d) Sieving
Answer: d) Sieving
The process of converting a solid directly into a gas without passing through the liquid state is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Fusion
Answer: a) Sublimation
The process of converting a gas directly into a solid without passing through the liquid state is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Deposition
Answer: d) Deposition
The process of converting a solid directly into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: c) Melting
The process of converting a liquid directly into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: b) Evaporation
The process of converting a gas into a liquid by cooling or increasing the pressure is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Fusion
Answer: c) Condensation
The process of converting a gas into a solid without passing through the liquid state is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Deposition
Answer: d) Deposition
The process of converting a solid into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: c) Melting
The process of converting a liquid into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: b) Evaporation
The process of converting a gas into a liquid without passing through the solid state is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Fusion
Answer: c) Condensation
The process of converting a solid into a gas without passing through the liquid state is called:
a) Sublimation
b) Evaporation
c) Melting
d) Fusion
Answer: a) Sublimation
The process of converting a solid into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: c) Melting
The process of converting a liquid into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: b) Evaporation
The process of converting a gas into a liquid by cooling or increasing the pressure is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Fusion
Answer: c) Condensation
The process of converting a gas into a solid without passing through the liquid state is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Deposition
Answer: d) Deposition
The process of converting a solid into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: c) Melting
The process of converting a liquid into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: b) Evaporation
The process of converting a gas into a liquid without passing through the solid state is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Fusion
Answer: c) Condensation
The process of converting a solid into a gas without passing through the liquid state is called:
a) Sublimation
b) Evaporation
c) Melting
d) Fusion
Answer: a) Sublimation
The process of converting a gas into a solid without passing through the liquid state is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Deposition
Answer: d) Deposition
The process of converting a solid into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: c) Melting
The process of converting a liquid into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
Answer: b) Evaporation
The process of converting a gas into a liquid by cooling or increasing the pressure is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Fusion
Answer: c) Condensation
