Test Bank - Chemistry: The Central Science, 14th Edition (Brown), Chapter 1-24 | All Chapters

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Chemistry: The Central Science, 14e (Brown, et al.) Cha
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pter 2 Atoms, Molecules, and Ions
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2.1 Multiple-Choice Questions wd




1) A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a stat
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ement of . wd wd


A) the law of multiple proportions
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B) the law of constant composition
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C) the law of conservation of mass
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D) the law of conservation of energy
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E) none of the abov wd wd wd


e Answer: B
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Diff: 2 Var: 1 Page Ref: Sec. 2.1
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2) Which one of the following is not one of the postulates of Dalton's atomic theory?
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A) Atoms are composed of protons, neutrons, and electrons.
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B) All atoms of a given element are identical; the atoms of different elements are differen
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t and have different properties.
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C) Atoms of an element are not changed into different types of atoms by chemical react
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ions: atoms are neither created nor destroyed in chemical reactions.
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D) Compounds are formed when atoms of more than one element combine; a given comp
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ound always has the same relative number and kind of atoms.
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E) Each element is composed of extremely small particles called ato
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ms. Answer: A wd w d


Diff: 1 Var: 1 Page Ref: Sec. 2.1
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3) Consider the following selected postulates of Dalton's atomic theory:
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(i) Each element is composed of extremely small particles called atoms.
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(ii) Atoms are indivisible. wd wd


(iii) Atoms of a given element are identical.
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(iv) Atoms of different elements are different and have different properties.
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Which of the postulates is(are) no longer considered valid?
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A) (i) and (ii) wd wd


B) (ii) only wd


C) (ii) and (iii) wd wd


D) (iii) only wd


E) (iii) and (iv wd wd


) Answer: C
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Diff: 2 Var: 1 Page Ref: Sec. 2.1
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1
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,DOWNLOAD THE Test Bank for Chemistry The Central Science 14th Edition Brow
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LO: 2. w d


1 GO:
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, DOWNLOAD THE Test Bank for Chemistry The Central Science 14th Edition Brow
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4) Which pair of substances could be used to illustrate the law of multiple proportions?
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A) SO2, H2SO4 wd


B) CO, CO2 wd


C) H2O, O2 wd


D) CH4, C6H12O6 wd


E) NaCl, KC wd


l Answer:
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B
Diff: 1 Var: 1 Page Ref: Sec. 2.1
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LO: 2. w d


1 GO:wd w


dG2

5) Which statement below correctly describes the responses of alpha, beta, and gamma radia
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tion to an electric field?
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A) Both beta and gamma are deflected in the same direction, while alpha shows no response.
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B) Both alpha and gamma are deflected in the same direction, while beta shows no response.
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C) Both alpha and beta are deflected in the same direction, while gamma shows no response.
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D) Alpha and beta are deflected in opposite directions, while gamma shows no response.
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E) Only alpha is deflected, while beta and gamma show no respo
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nse. Answer: D wd w d


Diff: 2 Var: 1 Page Ref: Sec. 2.2
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2 GO:wd w


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6) Which one of the following is not true concerning cathode rays?
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A) They originate from the negative electrode.
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B) They travel in straight lines in the absence of electric or magnetic fields.
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C) They impart a negative charge to metals exposed to them.
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D) They are made up of electrons.
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E) The characteristics of cathode rays depend on the material from which they are emi
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tted. Answer: Ewd w d


Diff: 2 Var: 1 Page Ref: Sec. 2.2
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LO: 2. w d


2 GO:wd w


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7) The charge on an electron was determined in the
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A) cathode ray tube, by J. J. Thomson wd wd wd wd wd wd


B) Rutherford gold foil experiment wd wd wd


C) Millikan oil drop experiment wd wd wd


D) Dalton atomic theory wd wd


E) atomic theory of matte wd wd wd


r Answer: C
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Diff: 1 Var: 1 Page Ref: Sec. 2.2
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