WAZZAP > Quiz 10 > Flashcards

Quiz 10 Flashcards

(50 cards)

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1
Q
  1. Which of the following is NOT true of liquids?

they have no definite shape or volume

they have a definite shape

they have a boiling point

A

they have a definite shape

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2
Q
  1. The composition of a mixture

may vary

remains constant

has a definite ratio throughout

is easily calculated

A

may vary

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3
Q
  1. The intrinsic energy in the particles of any pure substance is highest in the

solid phase

liquid phase

gaseous phase

gel phase

A

gaseous phase

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4
Q
  1. Which of the following is not a pure substance?

water

hydrogen

milk

oxygen

A

milk

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5
Q
  1. A(n) ______ is always composed of the same elements combined in a definite proportion by mass.

isotope

compound

ion

allotrope

A

compound

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6
Q
  1. Which of the following is true of our understanding of the nature of the atom?

It has undergone little, but significant change and is now complete

It has undergone change and will likely continue to do so

It is just as the ancients originally described it

It has undergone such major changes it is returning to the ancient model

A

It has undergone change and will likely continue to do so

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7
Q
  1. An example of a chemical change is

freezing a water

breaking a glass

sublimation of carbon dioxide

digestion of food

A

digestion of food

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8
Q
  1. The bond formed by the sideways overlap of p-orbitals is

ionic

sigma

pi

coordinate

A

pi

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9
Q
  1. Equal sharing of a pair of electrons between two atoms results in the formation of

nonpolar bond

polar bond

ionic bond

coordinate bond

A

nonpolar bond

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10
Q
  1. To balance chemical equations, one has to change the

formulas

subscripts

coefficients

charge

A

coefficients

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11
Q
  1. The ionization energies of metals from top to bottom of a family or group

increase

decrease

does not change

remain the same

A

remain the same

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12
Q
  1. The bond which involves the complete transfer of electrons

polar bond

nonpolar bond

ionic bond

coordinate bond

A

ionic bond

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13
Q
  1. The charge of the nucleus is due to the

ions

protons

electrons

neutrons

A

electrons

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14
Q
  1. Air is

an element

a compound

a homogeneous mixture

a heterogeneous mixture

A

a heterogeneous mixture

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15
Q
  1. The scientist who formulated the earliest atomic theory is

Charles Mortimer

James Chadwick

Ernest Rutherford

John Dalton

A

John Dalton

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16
Q
  1. Which group of metals is most reactive?

IA

IIA

IIIA

IVA

A

IA

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17
Q
  1. Who suggested that an atom has a nucleus or center in which the positive charge and mass are concentrated?

Thompson

Goldstein

Rutherford

Milleken

A

Rutherford

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18
Q
  1. The symbol of an element represents

a molecule

a radical

an atom

an ion

A

an atom

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19
Q
  1. As the number of neutrons in an atom of a given element increases, its atomic number

increases

decreases

varies

remains constant

A

increases

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20
Q
  1. The father of modern chemistry is

John Dalton

Antoine Lavoisier

Robert Boyle

Joseph Priestly

A

Antoine Lavoisier

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21
Q
  1. Which accounts for the alkalinity of bases in water?

oxide ions

hydronium ions

ammonium ions

hydroxide ions

Study These Flashcards
A

hydronium ions

22
Q
  1. Iodine, when heated, passes from the solid phase directly to the gaseous phase. This is an example of

Charle”s law

sublimation

vapor pressure

heat of fusion

23
Q
  1. When hydrogen ions unite with hydroxide ions to form water, the process is known as

titration

hydrolysis

neutralization

decomposition

24
Q
  1. Solutions of both acids and bases are alike in that they both

taste sour

are electrolytes

accept a proton

accept an electron

Study These Flashcards
A

are electrolytes

25
25. The substance that is oxidized in a redox reaction is oxidizing agent oxidizer reducing agent gainer of electrons
reducing agent
26
26. Aluminum hydroxide is an amphoteric compound. This means that aluminum hydroxide is highly colored is used as a reducing agent insoluble in strong base can act as weak acid or weak base
can act as weak acid or weak base
27
27. Acetic acid is classified as weak acid because it does not ionize in water does not neutralize bases slightly ionize in water react rapidly with zinc to produce hydrogen
slightly ionize in water
28
28. According to Bronsted Lowry theory, an acid is any substance that donates a proton donates an electron pair donates an electron accepts an electron pair
donates a proton
29
29. The hydronium ion is a complex ion composed of an electron a neutron a proton a positron
a proton
30
30. The exact amount of solute dissolve in a given amount of solvent is concentration unsaturated dilution of solution solubility of solute
solubility of solute
31
31. The chaotic zigzag motion of particle in solution is describe by electrical charge effect Tyndall effect Brownian movement Osmosis
Brownian movement
32
32. The temperature at which the vapor pressure is equal to the prevailing atmospheric pressure is boiling point melting point freezing point critical point
boiling point
33
33. The indicator which turns yellow in basic solution is phenolphthalein blue litmus methyl orange red litmus
methyl orange
34
34. A base is an electron pair donor as defined by Arrhenius Lewis Democritus Bronsted Lowry
Lewis
35
35. An acid is classified as strong only in concentrated solutions if it turns blue litmus red if it forms salt with NaOH if it ionizes almost completely in solution
if it ionizes almost completely in solution
36
36. Which of these is always formed when an acid neutralizes with base? a precipitate water a soluble salt an insoluble salt
water
37
37. In a reaction mechanism, the rate determining step is slow step second step first step fast step
slow step
38
38. When a substance gains electrons it is oxidized increase in oxidation number is reduced lose protons
is reduced
39
39. Which term is applied to an aqueous solution whose hydrogen ion concentration is less than the hydroxide ion concentration? basic neutral acidic unsaturated
basic
40
40. A chemical compound is always composed of the same kind of atoms in the same proportion. This is an expression of the law of chemical change law of multiple proportions law of definite proportions law of conservation of mass
law of definite proportions
41
41. Elements are composed of extremely small particles called atoms. All atoms of the same element are alike, and atoms of different elements are different. This is an expression of the quantum theory kinetic theory dalton’s theory Bohr theory
dalton’s theory
42
42. The magnetic quantum number is related to the direction of turning orientation in space shape of the electron cloud distance from the nucleus
orientation in space
43
43. The maximum number of electrons that can stay in a d-orbital is 10 8 6 2
2
44
44. Deuterium or heavy hydrogen has an atomic number of 1 and a mass of 3 2 1 4
2
45
45. Neon belong to a type of element called representative transition inner transition noble gases
noble gases
46
46. Which of the following is a physical change? decomposition sublimation fermentation oxidation
sublimation
47
47. The chemistry of compounds of carbon is called inorganic chemistry biochemistry physical chemistry organic chemistry
organic chemistry
48
48. A measure of the amount of matter in a sample is the specific gravity density mass weight
mass
49
49. The kind of bond formed between hydrogen and fluorine is coordinate covalent nonpolar covalent polar covalent ionic
polar covalent
50
50. One of the following molecules do not follow the octet rule. This molecule is PCl3 SbCl3 BF3 NH3
BF3
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