CIE Chemistry Advanced Subsidiary (AS) Level Practice Test

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• In a chemical reaction, it is endothermic if which condition applies?
• Electrophiles are defined as
• A carbocation is defined as which of the following?
• What is the approximate bond angle in water (H2O)?
• Bond energy is the energy needed to break 1 mole of a bond in gaseous molecules.
• In a chemical reaction, it is exothermic if which condition applies?
• Ionisation energy is the energy needed to remove 1 mole of electrons from 1 mole of atoms in a gaseous state.
• The reducing agent is the substance that donates electrons.
• A reversible reaction is
• The term that describes the attraction of an atom for electrons in a covalent bond is
• Dipole is
• Bond energy is defined as
• Which statement describes standard conditions for comparing gases?
• In an ion, the sum of the oxidation numbers equals what value?
• Elimination reaction is best described as
• Which statement best describes the role of the oxidising agent?
• In sulfate ion SO4^2-, what is the oxidation state of sulfur?
• Relative atomic mass is defined as the mass of one atom of an element relative to 1/12 of the mass of a carbon-12 atom.
• Which enzyme is commonly involved in the hydrolysis of starch?
• In sodium chloride, what are the oxidation numbers of sodium and chlorine?
• Which statement correctly describes the roles of nucleophiles and electrophiles?
• An elimination reaction results in the formation of what?
• If the number of moles doubles and the volume doubles while the temperature remains constant, what happens to the pressure?
• Liquids are described as which of the following regarding their particle arrangement and compressibility?
• Which statement about hydrolysis is true?
• Which of the following is the correct expression of the ideal gas law?
• Standard condition refers to temperature and pressure conditions that must be the same to compare moles of gases or enthalpy changes accurately.
• Hydrolysis of proteins yields:
• Which unit is used to express relative masses?
• Which statement best describes the reducing agent?
• In the standard enthalpy change of formation, the elements are in which state?
• In chemistry, stereo isomerism is best described as what?
• In a compound formed from two non-metals, how are oxidation numbers assigned?
• What molecular geometry is typical for an atom with sp3 hybridisation?
• What does Hess's Law state?
• Which process describes breaking a covalent bond such that both electrons go to the same atom, often generating a carbocation or carbanion?
• Ionic lattices are typically characterized by:
• According to the OIL RIG mnemonic, which statement is true?
• Which molecule has a linear shape with a 180-degree bond angle?
• The term electrophilic addition refers to the addition of electrophiles to which substrates?
• Which material is a giant covalent structure?
• Which geometry corresponds to three bonded atoms and one lone pair?
• Which statement about gas particles is true?
• What does amphoteric mean?
• What is homolytic fission?
• What is the oxidation number of sulfur in S8?
• Vapour pressure is defined as which of the following?
• What is the standard enthalpy change of neutralisation defined as?
• In ethane, carbon atoms are sp3 hybridised and form how many sp3 orbitals per carbon?
• Alloys are defined as:
• Van der Waals forces are
• Which molecule has trigonal bipyramidal geometry?
• Hydrolysis of an ester yields which products?
• What does sp hybridisation describe?
• Under standard thermodynamic conditions, what are the standard temperature and pressure?
• In carbon dioxide, what are the oxidation numbers of carbon and oxygen?
• Which substance is an example of a giant molecular structure?
• Empirical formula is the simplest formula of a compound showing the ratio of the number of atoms of different elements.
• Carbanions are best described as?
• In dynamic equilibrium, forward and reverse reactions occur at the same rate.
• Substitution reactions typically yield
• What is the standard enthalpy change of combustion defined as?
• The temperature of a gas is related to what aspect of its molecules?
• What is the composition of sp2 hybrid orbitals?
• Solids are best described as which of the following?
• In a neutralisation reaction, what is formed per mole under standard conditions?
• In a compound formed from a metal and a non-metal, what are the typical oxidation numbers for metal and non-metal?
• Which statement correctly describes bond breaking and bond forming?
• Relative formula mass is the mass of one formula unit of a compound measured on a scale in which a carbon-12 atom has a mass of exactly 12.
• Structural isomerism refers to
• What is the standard enthalpy change of formation defined as?
• In a substitution reaction, what happens?
• What does oxidation number refer to?
• Which intermolecular force is the strongest and occurs when hydrogen is bonded to highly electronegative elements such as fluorine, oxygen, or nitrogen?
• Nucleophile is defined as
• In electrophilic addition to alkenes, which species acts as the electrophile?
• What is true about collisions between gas particles in the kinetic theory?
• What is the standard enthalpy change ΔH° defined as?
• Electronegativity definition
• In most compounds, what is the oxidation number of oxygen?
• Which statement correctly describes the movement of gas particles?
• What is the key feature of metallic bonding?
• Addition reactions are typically characterized by
• Which statement distinguishes empirical and molecular formulas?
• An ionic lattice is best described as which of the following?
• If the molecular formula is a multiple of the empirical formula, what is true?
• Rate of reaction refers to
• Which statement best pairs a species with its description?
• The sideways overlap of p orbitals forms which type of bond?
• Which type of bond fission produces free radicals?
• Which geometry corresponds to two bonded atoms and two lone pairs?
• Catalyst definition
• Which statement about hydrolysis is incorrect?
• Permanent dipole-dipole forces arise between molecules due to what?
• Which description matches heterolytic fission?
• Lattice energy is defined as what?
• Hydrolysis of DNA would ultimately yield which building blocks?
• Which statement correctly describes the mole?
• Activation energy is
• Carbocation is defined as
• Hydrolysis is best described as:
• What term describes the weak forces of attraction between covalent molecules?
• Which of the following polymers is commonly broken down by hydrolysis into simple sugars?
• What is the geometry for six bonded atoms and no lone pairs?
• Condensation is the change of state from a gas to a liquid. Which choice correctly defines this process?
• Enthalpy change of reaction is the energy transferred in a chemical reaction.
• What is the sum of the oxidation numbers in a neutral compound?
• A metallic lattice is characterized by which description?
• What is a pi bond?
• Which statement correctly describes sp3 hybridisation?
• Real gases deviate from ideal gases under which conditions?
• Which description correctly defines hydrolysis?
• In redox reactions, which statement is true?
• The oxidation number of aluminium in Al3+ is?
• Relative atomic mass is measured on a scale where the carbon-12 atom has a mass of 12.
• What is the oxidation number of chlorine in Cl-?
• During hydrolysis, what is typically produced from a polymer?
• Le Chatelier's principle describes how a system at dynamic equilibrium responds to a stress by doing what?
• In PV = nRT, which statement about units is true?
• What is the standard enthalpy change of hydration of anhydrous salt defined as?
• Which molecule is directly involved in hydrolysis to break glycosidic bonds in starch?
• Giant molecular structures are best described as:
• Between carbon atoms in ethene, what types of bonds are present?
• What is a sigma bond?
• What angle is characteristic of a trigonal bipyramidal arrangement?
• The enthalpy change of atomisation refers to forming what from what?
• Which substance is a simple molecular lattice?
• Dynamic equilibrium occurs when
• Which of the following is a common biological example of hydrolysis?
• Free radical substitution occurs on what type of hydrocarbon?
• An electrophile is best described as what?
• What is the standard enthalpy change of atomisation defined as?
• In methane, the carbon atom forms four sigma bonds.
• Isotopic masses occur because there are atoms of an element with the same number of protons but different number of neutrons.
• An addition reaction typically yields what?
• Molecular formula tells us the actual numbers of each type of atom in a molecule.
• What characterizes a dynamic equilibrium system?
• What is the typical oxidation number of fluorine in compounds?
• What is the standard enthalpy change of solution defined as?
• Metallic lattices feature:
• Hybridisation of atomic orbitals refers to which process?
• Which statement describes the standard enthalpy change of solution when dissolving to form an infinitely dilute solution?
• In hydrogen chloride (HCl), what are the oxidation numbers of hydrogen and chlorine?
• Which statement about addition reactions to alkenes is true?
• What is an atomic orbital?
• Oxidation is best described by which statement?
• Carbanions are defined as
• In peroxides, oxygen has oxidation number
• Boiling point is defined as:
• Hydrolysis reaction is defined as
• Molecular mass is defined as the mass of one molecule of an element or a compound relative to 1/12 of the mass of a carbon-12 atom.
• Standard states are defined as:
• In a neutral compound, the sum of the oxidation numbers is
• Which molecule has octahedral geometry?
• Heterolytic fission is defined as
• Which two pathways are described for substitution reactions in the material?
• In magnesium oxide MgO, what are the oxidation numbers of magnesium and oxygen?
• Hydrolysis of triglycerides yields which products?
• Which molecule has a tetrahedral geometry?
• What is the oxidation number of an element in its uncombined, elemental form?
• Which statement describes stereoisomerism?
• What is the bond angle in a tetrahedral molecule?
• What is the molecular geometry around a central atom with three bonded atoms and no lone pairs?
• Nucleophilic substitution is commonly associated with which substrates?
• What is the oxidation number of hydrogen in most compounds?
• In Bronsted-Lowry theory, what is the role of acids and bases?
• Standard enthalpy change of reaction (ΔH°rxn) refers to:
• What does the hydration enthalpy of anhydrous salt describe?
• Intermolecular forces are
• Hydrolysis of ester bonds typically yields which pair?
• In a compound, which element is assigned the negative oxidation number due to electronegativity?
• What is an electrophile?
• In aqueous acid or enzyme-catalyzed reactions, hydrolysis of a polymer proceeds by adding a molecule of which substance?
• Which gases approach ideal behaviour due to weak intermolecular forces?
• A nucleophile is best described as what?