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WAZZAP > Quiz 10 > Flashcards

Quiz 10 Flashcards

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

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

A

sublimation

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

titration

hydrolysis

neutralization

decomposition

A

hydrolysis

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

A

are electrolytes

25
Q
  1. The substance that is oxidized in a redox reaction is

oxidizing agent

oxidizer

reducing agent

gainer of electrons

A

reducing agent

26
Q
  1. 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

A

can act as weak acid or weak base

27
Q
  1. 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

A

slightly ionize in water

28
Q
  1. 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

A

donates a proton

29
Q
  1. The hydronium ion is a complex ion composed of

an electron

a neutron

a proton

a positron

A

a proton

30
Q
  1. The exact amount of solute dissolve in a given amount of solvent is

concentration

unsaturated

dilution of solution

solubility of solute

A

solubility of solute

31
Q
  1. The chaotic zigzag motion of particle in solution is describe by

electrical charge effect

Tyndall effect

Brownian movement

Osmosis

A

Brownian movement

32
Q
  1. The temperature at which the vapor pressure is equal to the prevailing atmospheric pressure is

boiling point

melting point

freezing point

critical point

A

boiling point

33
Q
  1. The indicator which turns yellow in basic solution is

phenolphthalein

blue litmus

methyl orange

red litmus

A

methyl orange

34
Q
  1. A base is an electron pair donor as defined by

Arrhenius

Lewis

Democritus

Bronsted Lowry

A

Lewis

35
Q
  1. 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

A

if it ionizes almost completely in solution

36
Q
  1. Which of these is always formed when an acid neutralizes with base?

a precipitate

water

a soluble salt

an insoluble salt

A

water

37
Q
  1. In a reaction mechanism, the rate determining step is

slow step

second step

first step

fast step

A

slow step

38
Q
  1. When a substance gains electrons it

is oxidized

increase in oxidation number

is reduced

lose protons

A

is reduced

39
Q
  1. Which term is applied to an aqueous solution whose hydrogen ion concentration is less than the hydroxide ion concentration?

basic

neutral

acidic

unsaturated

A

basic

40
Q
  1. 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

A

law of definite proportions

41
Q
  1. 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

A

dalton’s theory

42
Q
  1. The magnetic quantum number is related to the

direction of turning

orientation in space

shape of the electron cloud

distance from the nucleus

A

orientation in space

43
Q
  1. The maximum number of electrons that can stay in a d-orbital is

10

8

6

2

A

2

44
Q
  1. Deuterium or heavy hydrogen has an atomic number of 1 and a mass of

3

2

1

4

A

2

45
Q
  1. Neon belong to a type of element called

representative

transition

inner transition

noble gases

A

noble gases

46
Q
  1. Which of the following is a physical change?

decomposition

sublimation

fermentation

oxidation

A

sublimation

47
Q
  1. The chemistry of compounds of carbon is called

inorganic chemistry

biochemistry

physical chemistry

organic chemistry

A

organic chemistry

48
Q
  1. A measure of the amount of matter in a sample is the

specific gravity

density

mass

weight

A

mass

49
Q
  1. The kind of bond formed between hydrogen and fluorine is

coordinate covalent

nonpolar covalent

polar covalent

ionic

A

polar covalent

50
Q
  1. One of the following molecules do not follow the octet rule. This molecule is

PCl3

SbCl3

BF3

NH3

A

BF3

WAZZAP (31 decks)

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