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