AIC SS1 Chemistry Exam- 2nd Term 23/24
A) Nitrogen and oxygen B) Oxygen and hydrogen C) Carbon and oxygen D) Sulphur and oxygen
A) X3Y2 B) XY2 C) X2Y3 D) X2Y 
A) 8 and 2 B) 1 and 3 C) 2 and 3 D) 6 and 2
A) -5 B) -7 C) +8 D) +7
A) Evaporation B) Melting C) Sublimation D) Crystallisation
A) Argon B) Chlorine C) Sulphur D) Potassium
A) Protons between two atoms B) Neutrons between two atoms C) Electrons from one atom to another D) Electrons between two atoms
A) NaCl B) CO2 C) NH3 D) H2O
A) Formation of covalent bonds between atoms B) Sharing of electrons between atoms C) Transfer of electrons between atoms D) Presence of positive ions in a sea of delocalized electrons
A) Carbon dioxide B) Sodium chloride C) Water D) Iron
A) Atomic radius of atoms B) Electron affinity of atoms C) Electronegativity difference between atoms D) All of the above
A) Helium B) Oxygen C) Nitrogen D) Carbon
A) Weak intermolecular forces between molecules B) Strong electrostatic attractions between ions C) Strong covalent bonds between atoms D) Weak intramolecular forces within molecules
A) Sodium chloride (NaCl) B) Hydrogen peroxide (H2O2) C) Methane (CH4) D) Ethanol (C2H5OH)
A) Have fixed positions in a lattice structure B) Have strong intermolecular forces of attraction C) Are closely packed together D) Have negligible volume compared to the space they occupy
A) The arrangement of particles within a gas B) The chemical reactions occurring within a gas C) The density of particles within a gas D) The motion of particles within a gas
A) Melting of ice B) Burning of wood C) Digestion of food D) Rusting of iron
A) Pressure and volume of a gas B) Volume and number of moles of a gas C) Pressure and temperature of a gas D) Temperature and volume of a gas
A) PV = RT B) PV = nRT C) PV = nT D) P = V/nRT
A) Pressure B) Square root of its molar mass C) Temperature D) Volume
A) Atomic mass B) Number of moles C) Density D) Volume
A) Moles in one liter of a gas B) Electrons in one atom of a substance C) Particles in one gram of a substance D) Atoms in one mole of a substance
A) H2O B) HCN C) NH3 D) CO2
A) Large difference in electronegativity B) High similarity in electronegativity C) Both elements are non-metals D) Similar electron affinity values
A) Sodium B) Helium C) Chlorine D) Oxygen
A) They can be polar or non-polar B) They involve sharing electrons. C) They form between atoms with similar electronegativity. D) They are responsible for the high melting and boiling points of many molecules.
A) Covalent bonding B) Hydrogen bonding C) London dispersion forces D) Dipole-dipole interactions
A) They are constantly in motion. B) They have specific shapes. C) They occupy a significant volume. D) They attract each other strongly
A) solids are rigid and have definite shapes B) liquids flow easily and have indefinite shapes. C) gases expand to fill their container. D) all three statements are true.
A) dependent on the container size. B) inversely proportional to its temperature C) constant D) directly proportional to its temperature
A) R B) P C) K D) V
A) wood and oxygen is greater than the mass of the products. B) wood decreases, while the mass of the products remains constant. C) wood and oxygen is less than the mass of the products. D) wood and oxygen is equal to the mass of the carbon dioxide and water vapor.
A) elements are used directly. B) are not needed, only the coefficients are important. C) compounds are ignored. D) reactants and products are used to convert between grams and moles.
A) know the physical properties of all the reactants and products. B) memorize the names of all elements and compounds. C) perform complex mathematical calculations. D) balance the chemical equation first.
A) Water (H₂O) always contains hydrogen and oxygen in a 2:1 ratio by mass. B) Carbon dioxide (CO₂) has a constant ratio of carbon to oxygen, regardless of its origin. C) The color of a compound can vary depending on its source. D) All samples of table salt (NaCl) have the same ratio of sodium to chlorine.
A) 1:3/2 B) Cannot be determined without additional information. C) 1:2 D) 2:3
A) Two molecules of hydrogen react with one molecule of oxygen to form two molecules of water. B) Hydrogen and oxygen react explosively to form water. C) Water can decompose into hydrogen and oxygen under specific conditions. D) 2 grams of hydrogen react with 1 gram of oxygen to produce water.
A) all chemical reactions. B) only elements, not compounds. C) elements that can form more than one compound with another element. D) compounds that can react with each other.
A) the names of the reactants and products B) the states of matter of the reactants and products. C) the relative amounts of each molecule or atom involved in the reaction. D) the order in which the reactants combine.
A) Cannot be determined without additional information. B) 2.5 moles C) 10 moles D) 5 moles |
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