Test Bank For Chemistry A Molecular Approach, Global Edition, 6th Edition Nivaldo J. Tro

Chemistry: A Molecular Approach, 6e, Global Edition (Tro)
Chapter 1 Matter, Measurement, and Problem Solving

Multiple Choice Questions

1) Molecules can be described as
A) mixtures of two or more pure substances.
B) mixtures of two or more elements that have a specific ratio between components.
C) two or more atoms chemically joined together.
D) heterogeneous mixtures.
E) homogeneous mixtures.
Answer: C
Diff: 1 Var: 1 Page Ref: 21.10, Ex. Prob.
Global: G1

2) Identify the TRUE statement.
A) Hydrogen peroxide is used as rocket fuel and removes color from hair.
B) Hydrogen peroxide is safe to drink.
C) Hydrogen peroxide is a stable molecule.
D) Water reacts with skin.
E) Hydrogen peroxide is smaller than water.
Answer: A
Diff: 2 Var: 1 Page Ref: 1.1
Global: G1

3) Which of the following represents a hypothesis?
A) Sodium reacts with water to form sodium hydroxide and hydrogen gas.
B) Argon gas is a fairly inert substance.
C) Water is a liquid at room temperature.
D) When a substance combusts, it combines with air.
E) When paper burns, heat is given off.
Answer: D
Diff: 2 Var: 1 Page Ref: 1.2
LO: 1.1
Global: G2

4) The statement, "In a chemical reaction, matter is neither created nor destroyed" is called
A) the Law of Conservation of Mass.
B) Dalton's Atomic Theory.
C) the Scientific Method.
D) the Law of Multiple Proportions.
E) the Law of Definite Proportions.
Answer: A
Diff: 1 Var: 1 Page Ref: 1.2
LO: 1.1
Global: G1




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,5) Dalton's Atomic Theory states
A) that all elements have several isotopes.
B) that matter is composed of small indestructible particles.
C) that the properties of matter are determined by the properties of atoms.
D) that energy is neither created nor destroyed during a chemical reaction.
E) that an atom is predominantly empty space.
Answer: B
Diff: 1 Var: 1 Page Ref: 1.2
LO: 1.1
Global: G1

6) A scientific theory
A) is just a theory.
B) is a strict set of rules and procedures that lead to inarguable fact.
C) isn't used much in modern chemistry.
D) is based on continued observation and experiment.
E) is a framework for proving an argument you know to be true.
Answer: D
Diff: 1 Var: 1 Page Ref: 1.2
LO: 1.1
Global: G1

7) Which of the following statements is TRUE?
A) Experiments are not needed to validate a theory.
B) Once a theory is proposed, it is considered fact.
C) A hypothesis is speculation that is difficult to test.
D) An observation explains why nature does something.
E) A scientific law summarizes a series of related observations.
Answer: E
Diff: 1 Var: 1 Page Ref: 1.2
LO: 1.1
Global: G1

8) Identify a liquid.
A) definite volume and definite shape
B) definite volume and no definite shape
C) definite shape and no definite volume
D) no definite shape and no definite volume
Answer: B
Diff: 1 Var: 1 Page Ref: 1.3
LO: 1.2
Global: G1




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,9) Identify a solid.
A) definite volume and definite shape
B) definite volume and no definite shape
C) definite shape and no definite volume
D) no definite shape and no definite volume
Answer: A
Diff: 1 Var: 1 Page Ref: 1.3
LO: 1.2
Global: G1

10) Identify a gas.
A) definite volume and definite shape
B) definite volume and no definite shape
C) definite shape and no definite volume
D) no definite shape and no definite volume
Answer: D
Diff: 1 Var: 1 Page Ref: 1.3
LO: 1.2
Global: G1

11) Which of the following statements about crystalline and amorphous solids is TRUE?
A) A crystalline solid is composed of atoms or molecules arranged with long-range repeating order.
B) An example of a crystalline solid is plastic.
C) An example of an amorphous solid is diamond.
D) A crystalline solid is composed of atoms or molecules with a majority of its volume empty.
E) All of the above statements are TRUE.
Answer: A
Diff: 1 Var: 1 Page Ref: 1.3
LO: 1.2
Global: G1

12) Which of the following statements about the phases of matter is TRUE?
A) In both solids and liquids, the atoms or molecules pack closely to one another.
B) Liquids are highly compressible.
C) Gaseous substances have no space between atoms or molecules.
D) There is only one type of geometric arrangement that the atoms or molecules in any solid can adopt.
E) Solids are free to move around.
Answer: A
Diff: 1 Var: 1 Page Ref: 1.3
LO: 1.2
Global: G1




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, 13) A substance that can't be chemically broken down into simpler substances is
A) a homogeneous mixture.
B) an element.
C) a heterogeneous mixture.
D) a compound.
E) an electron.
Answer: B
Diff: 1 Var: 1 Page Ref: 1.3
LO: 1.2
Global: G1

14) A substance composed of two or more elements in a fixed, definite proportion is
A) a homogeneous mixture.
B) a heterogeneous mixture.
C) a compound.
D) a solution.
E) an alloy.
Answer: C
Diff: 1 Var: 1 Page Ref: 1.3
LO: 1.2
Global: G1

15) Decanting is
A) a process in which the more volatile liquid is boiled off.
B) dissolving a solid into a liquid.
C) separating a solid from a liquid by pouring off the liquid.
D) pouring a mixture through a filter paper to separate the solid from the liquid.
E) heating a mixture of two solids to fuse them together.
Answer: C
Diff: 1 Var: 1 Page Ref: 1.3
Global: G1

16) Distillation is
A) a process in which the more volatile liquid is boiled off.
B) dissolving a solid into a liquid.
C) separating a solid from a liquid by pouring off the liquid.
D) pouring a mixture through a filter paper to separate the solid from the liquid.
E) heating a mixture of two solids to fuse them together.
Answer: A
Diff: 1 Var: 1 Page Ref: 1.3
Global: G1




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