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