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AP Chemistry — All Units 1-9 Progress Check: MCQ’s Answers w/Explanations 2023-2024.
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CUMULATIVE EXAM CHEMISTRY FINAL EXAM NEWESTACTUAL EXAM COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |
ALREADY GRADED A+
What is chemistry - ANSWER: the study of matter and the changes it undergoes
What are elements classified as? - ANSWER: metals, nonmetals, metalloids
Can elements be broken down? - ANSWER: No
What are the diatomic molecules? - ANSWER: H2, N2, O2, F2, Cl2, Br2, I2
What are mixtures - ANSWER: Substances containing two or more different elements
that are not chemically bonded together
What type of mixtures are there? - ANSWER: heterogeneous and homogeneous
What is a colloid? - ANSWER: A mixture containing small, undissolved particles that
do not settle out.
What is a suspension? - ANSWER: A mixture in which particles can be seen and easily
separated by settling or filtration
What is matter? - ANSWER: anything that has mass and volume
What are the 2 properties of matter? - ANSWER: extensive and intensive
What does extensive mean? - ANSWER: depends on the amount of matter
What does intensive mean? - ANSWER: Depends on type in sample
What are all of the phase transitions? - ANSWER: Melting, freezing, evaporation,
condensing, sublimation, and deposition.
What is melting point? - ANSWER: the temperature at which a substance changes
from a solid to a liquid
What is freezing point - ANSWER: the temperature at which a liquid becomes a solid
What is evaporation - ANSWER: When a liquid turns into a gas
What is condensing - ANSWER: The change of state from a gas to a liquid
, What is sublimation? - ANSWER: the process in which a solid changes directly into a
gas
What is deposition? - ANSWER: gas to solid
What is a Chemical change? - ANSWER: a change that produces matter with a
different composition than the original matter
What is a physical change? - ANSWER: A change in which the form or appearance
changes, but no new substances are formed
Is iron rusting a physical or chemical change? - ANSWER: chemical change
Is wood burning a chemical or physical change? - ANSWER: chemical change
Is freezing a physical or chemical change? - ANSWER: physical change
Is cutting paper a physical or chemical change? - ANSWER: physical change
What is a separation technique? - ANSWER: A process that converts a mixture of
solution of a chemical substance into two or more distinct product mixtures.
What are all examples of separation techniques? - ANSWER: Distillation,
evaporation, filtration, and chromatography.
What is distillation? - ANSWER: the action of purifying a liquid by a process of
heating and cooling.
What is evaporation? - ANSWER: When a liquid turns into a gas
What is filtration? - ANSWER: the process that separates a solid from the liquid in a
heterogeneous mixture
What is chromatography? - ANSWER: process by which it can separate complex
mixtures into their component parts
What are Daulton's theories - ANSWER: 1. All elements are composed of indivisible
particles called atoms. 2. Atoms of the same element are identical. The atoms of any
one element are different from those of another. 3. Atoms of different elements mix
or combine in whole number ratios. 4. Chemical reactions occur when atoms
separate, join, or rearrange. In a chemical reaction, atoms of one element never
change into one another.
Who was Democritus and what did he do? - ANSWER: Greek philosopher who was
among the first to suggest the existence of atoms
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