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