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Inorganic Chemistry: Basics and Reactions Online MCQs with Answers
The atomic number of an element is determined by the number of:
a) Protons
b) Electrons
c) Neutrons
d) Protons and neutrons
An atom that has gained or lost electrons is called a/an:
a) Ion
b) Isotope
c) Element
d) Molecule
The mass number of an atom is determined by the number of:
a) Protons
b) Electrons
c) Neutrons
d) Protons and neutrons
The periodic table is arranged in order of increasing:
a) Atomic number
b) Atomic mass
c) Electronegativity
d) Ionization energy
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
The group number of an element in the periodic table represents the number of:
a) Protons
b) Electrons
c) Neutrons
d) Valence electrons
The vertical columns in the periodic table are called:
a) Periods
b) Groups
c) Blocks
d) Families
The horizontal rows in the periodic table are called:
a) Periods
b) Groups
c) Blocks
d) Families
Which of the following elements is an alkali metal?
a) Sodium (Na)
b) Calcium (Ca)
c) Chlorine (Cl)
d) Iron (Fe)
Which of the following elements is a halogen?
a) Sodium (Na)
b) Calcium (Ca)
c) Chlorine (Cl)
d) Iron (Fe)
The oxidation state of oxygen in most compounds is:
a) +1
b) -1
c) 0
d) +2
The general formula for an alkane is:
a) CₙH₂ₙ
b) CₙH₂ₙ₊₁
c) CₙH₂ₙ₊₂
d) CₙHₙ
Which of the following elements is a transition metal?
a) Sodium (Na)
b) Calcium (Ca)
c) Iron (Fe)
d) Oxygen (O)
The process of converting a metal into its oxide is called:
a) Reduction
b) Oxidation
c) Combustion
d) Hydrolysis
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
Which of the following is a strong acid?
a) Acetic acid (CH₃COOH)
b) Hydrochloric acid (HCl)
c) Nitric acid (HNO₃)
d) Carbonic acid (H₂CO₃)
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
Which of the following is an example of a redox reaction?
a) Acid-base neutralization
b) Precipitation reaction
c) Combustion reaction
d) Hydrolysis reaction
The process of adding oxygen to a substance is called:
a) Reduction
b) Oxidation
c) Combustion
d) Hydrolysis
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
The process of removing oxygen from a substance is called:
a) Reduction
b) Oxidation
c) Combustion
d) Hydrolysis
The general formula for an alkene is:
a) CₙH₂ₙ
b) CₙH₂ₙ₊₁
c) CₙH₂ₙ₊₂
d) CₙHₙ
The general formula for an alkyne is:
a) CₙH₂ₙ
b) CₙH₂ₙ₊₁
c) CₙH₂ₙ₊₂
d) CₙHₙ
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
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
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
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
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
The process of combining two or more substances to form a new substance is called:
a) Decomposition
b) Combination
c) Displacement
d) Neutralization
The process of breaking down a compound into simpler substances is called:
a) Decomposition
b) Combination
c) Displacement
d) Neutralization
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
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
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
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
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
The process of adding water to a substance is called:
a) Oxidation
b) Reduction
c) Hydrolysis
d) Electrolysis
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
The process of removing water of crystallization from a hydrated compound by heating is called:
a) Filtration
b) Distillation
c) Decantation
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
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
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
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
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
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
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
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
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
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
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
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
The process of converting a solid into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
The process of converting a liquid into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
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
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
The process of converting a solid into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
The process of converting a liquid into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
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
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
The process of converting a solid into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
The process of converting a liquid into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
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
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
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
The process of converting a solid into a liquid by the application of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
The process of converting a liquid into a solid by the removal of heat is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
The process of converting a liquid into a gas by heating is called:
a) Sublimation
b) Evaporation
c) Melting
d) Freezing
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