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