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