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