Deck 1: Understanding Our World With Chemistry

Question 1

How are oils and grease removed from used household or restaurant water?

A)They sink to the bottom of a sedimentation tank and are removed.
B)A rotating skimmer removes them from the surface of a holding tank.
C)They are filtered off with screens.
D)They cannot be separated in wastewater treatment.

Answer 1

B

Question 2

Why is oxygen added to water during wastewater treatment?

A)To help separate solids from the water.
B)To aid bacteria in digesting organic matter in the water.
C)To help fish breathe it after it is released to natural waterways.
D)Oxygen is never added to wastewater.

Answer 2

B

Question 3

What do water treatment plants use to sterilize water as it is treated?

A)Ultraviolet light
B)Chlorine
C)Both of the above
D)Neither of the above

Answer 3

C

Question 4

Why are nitrogen and phosphorous compounds removed from water during wastewater treatment?

A)Because they can feminize fish populations downstream.
B)Because natural waters should contain no organic materials.
C)To prevent downriver algal blooms.
D)They are not; both of these compounds are beneficial to natural waters.

Question 5

What is the normal ratio of male to female white sucker fish in river waters in Colorado?

A)18 - 22% male, 78 - 82% female.
B)17 - 21% male, 79 - 83% female.
C)36 - 46% male, 54 - 63% female.
D)54 - 63% male, 36 - 46% female.

Question 6

Forensic chemistry can be used to determine the composition of:

A)Drugs
B)Explosives
C)Both of the above
D)Neither of the above

Question 7

Forensic science tries to provide a scientifically sound explanation of past events.

Question 8

Which of the following states of matter is generally considered the most ordered?

A)Gas
B)Liquid
C)Solid
D)Both solid and gas

Question 9

Concrete is an example of what kind of material?

A)A homogeneous mixture
B)A heterogeneous mixture
C)A heterogeneous compound
D)A homogeneous compound

Question 10

Copper sulfate, CuSO₄, is sometimes used to create the color of bluing in toilet water. Copper sulfate is an example of what?

A)A compound
B)A mixture
C)An alloy
D)An element

Question 11

Soda pop is a mixture of at least three substances. What are they?

A)Carbon monoxide, water, and sugar
B)Oxygen gas, water, and carbon dioxide
C)Carbon dioxide, ice, and sugar
D)Carbon dioxide, water, and sugar

Question 12

Which of the following represents the states of matter from least to most ordered?

A)liquids, solids, gases
B)gases, solids, liquids
C)solids, liquids, gases
D)gases, liquids, solids

Question 13

Matter is defined as the physical material and energy of the universe.

Question 14

What is constant in a liquid?

A)Volume
B)Shape
C)Both of the above
D)Neither of the above

Question 15

How are gases characterized?

A)By small distances between particles that are moving at low speeds
B)By small distances between particles that are moving at high speeds
C)By large distances between particles that are moving at low speeds
D)By large distances between particles that are moving at high speeds

Question 16

What are solids?

A)The least ordered state of matter
B)Material never composed of atoms
C)The most ordered state of matter
D)Always composed of compounds

Question 17

Pure substances:

A)have a uniform composition and cannot be separated by physical methods.
B)are always elements.
C)are solids in most cases.
D)have a uniform composition that can be separated by physical methods.

Question 18

A molecule is defined as an atom.

Question 19

The smallest unit of an element is an atom.

Question 20

Elements are defined as the simplest form of a mixture.

Question 21

What can elements form when they react with other substances?

A)isotopes
B)compounds
C)decay products
D)mixtures

Question 22

What is the simplest unit of an ionic compound?

A)a molecule
B)an element
C)a formula unit
D)an ion

Question 23

Which of the following is made from only one element?

A)aluminum foil
B)brass
C)bronze
D)common table salt

Question 24

A mixture is two or more substances that are mixed and chemically bonded to each other.

Question 25

When two or more substances are mixed and evenly distributed that a sample from any one part of the mixture is chemically identical to a sample from any other part, the mixture is said to be:

A)homogeneous.
B)complete.
C)heterogeneous.
D)molecular.

Question 26

How is an alloy defined?

A)A mixture of two metallic elements
B)A mixture of two or more non-metallic elements
C)A mixture of two or more metallic compounds
D)A mixture of two or more metallic elements

Question 27

Sugar in iced tea is an example of what?

A)A complete mixture
B)An incomplete mixture
C)A heterogeneous mixture
D)A homogeneous mixture

Question 28

Chromatography is used to separate compounds into elements.

Question 29

How can mixtures be separated?

A)Evaporation
B)Filtering
C)Both of the above
D)Neither of the above

Question 30

Common table salt, sodium chloride, is an example of what?

A)A mixture
B)An element
C)A homogeneous mixture
D)A compound

Question 31

What best describes sugar when dissolved in water?

A)A compound
B)An alloy
C)A heterogeneous compound
D)A mixture

Question 32

Why was chromatography originally developed?

A)To separate different particles in mixtures
B)To separate colored pigments in flowers
C)To separate different flavors in coffees
D)To distinguish colored components in coal tar

Question 33

The mobile phase in thin layer chromatography is often:

A)a liquid such as water.
B)a solid surface.
C)a small containment chamber.
D)a solid coating on a solid surface.

Question 34

Why are different materials separated by chromatography?

A)Each material has a slightly different color than the others in the mixture.
B)Each material moves at a slightly different speed from others in the mixture.
C)Each material is a different compound in the mixture.
D)Each material moves at a similar speed to others in the mixture.

Question 35

How do isotopes of an element differ?

A)In number of electrons
B)In number of protons
C)In number of neutrons
D)All of the above

Question 36

To whom does credit for the creation of the periodic table go?

A)Dmitri Mendeleev
B)Gregori Mendeleev
C)Petrovich Dmitrov
D)Freiderich Flintstone

Question 37

How many naturally occurring elements are on the periodic table?

A)90
B)91
C)92
D)93

Question 38

Mendeleev arranged his periodic table by order of increasing:

A)elemental volume.
B)proton count.
C)elemental mass.
D)elemental size.

Question 39

What is eka-aluminum now known as?

A)Gallium
B)Silicon
C)Boron
D)Indium

Question 40

What is the current element name for eka-silicon?

A)Indium
B)Gallium
C)Francium
D)Germanium

Question 41

A column of elements missed by Mendeleev is:

A)the halogens.
B)the noble gases.
C)the alkali metals.
D)the alkaline earth metals.

Question 42

What Latin word is the root of the atomic symbol, Au, for gold?

A)Natrium
B)Aurgentium
C)Argentum
D)Aurum

Question 43

What Greek word serves as the root for the atomic symbol, Na, for sodium?

A)Natron
B)Nartum
C)Nafion
D)The term for the root of the atomic symbol, Na, is not Greek; it is the Latin word natrium.

Question 44

Tungsten, molybdenum, sulfur, and iron are all examples of elemental metals.

Question 45

What common trait do the elements that are classed as metalloids all share?

A)They are all gases at room temperature.
B)They all conduct electricity extremely well.
C)They are all located on the left-hand side of the periodic table.
D)They all have properties between the extremes of the metals and the non-metals.

Question 46

Palladium (II) chloride has the formula PdCl₂.

Question 47

What metallic element is a liquid at room temperature?

A)Mercury
B)Gallium
C)Zinc
D)There are no metallic elements that are a liquid at room temperature.

Question 48

Sodium sulfate is sometimes used in washing detergent as a filler. How many of each atom are in sodium sulfate, Na₂SO₄?

A)2 sodium, 2 sulfur, and 4 oxygen atoms
B)1 sodium, 1 sulfur, and 4 oxygen atoms
C)2 sodium, 1 sulfur atom, and 2 oxygen molecules
D)2 sodium, 1 sulfur, and 4 oxygen atoms

Question 49

How many of each atom are in calcium nitrate, Ca(NO₃)₂?

A)1 calcium, 1 nitrogen, and 3 oxygen atoms
B)1 calcium, 2 nitrogen, and 3 oxygen atoms
C)1 calcium, 2 nitrogen, and 6 oxygen atoms
D)2 calcium, 2 nitrogen, and 6 oxygen atoms

Question 50

Calcium chloride is sometimes used in the winter to melt snow on roads - what is the formula of his compound, if it contains one atom of calcium and two of chlorine?

A)CaCl₂
B)CaCl
C)Ca₂Cl₂
D)Ca₂Cl

Question 51

What is the name of the element that uses the symbol Na?

A)Potassium
B)Sodium
C)Soda
D)Selenium

Question 52

What name is represented by the elemental symbol Hg?

A)Hydrogen
B)Mercury
C)Helium
D)Holmium

Question 53

K is the symbol for which element?

A)Potassium
B)Polonium
C)Phosphorus
D)Sodium

Question 54

Ru is the element symbol for which element?

A)Rhodium
B)Rubidium
C)Rhenium
D)Ruthenium

Question 55

The name that corresponds to the elemental symbol Rb is:

A)Rhodium.
B)Ruthenium.
C)Rubidium.
D)Rhenium.

Question 56

What is the correct element name that goes with the elemental symbol Au?

A)Gold
B)Silver
C)Copper
D)Lead

Question 57

The name that corresponds to the elemental symbol Pb is:

A)Iron.
B)Lead.
C)Gold.
D)Tin.

Question 58

Which is the correct name that corresponds to the elemental symbol P?

A)Lead
B)Phosphorus
C)Plumbus
D)Tin

Question 59

What element name corresponds to the elemental symbol Sb?

A)Antimony
B)Lead
C)Tin
D)Arsenic

Question 60

The name that corresponds to the elemental symbol F is:

A)Iron.
B)Fluorine.
C)Francium.
D)Astatine.

Question 61

What is the element name that corresponds to the elemental symbol Ag?

A)Astatine
B)Platinum
C)Gold
D)Silver

Question 62

What is the atomic symbol that corresponds to the name selenium?

A)Se
B)Sr
C)S
D)Sb

Question 63

The atomic symbol that corresponds to the name tungsten is:

A)P
B)W
C)B
D)H

Question 64

What atomic symbol corresponds to the element name iron?

A)I
B)In
C)Fe
D)F

Question 65

What is the correct atomic symbol for strontium?

A)Sr
B)Se
C)Sb
D)S

Question 66

The atomic symbol that corresponds to the name silver is:

A)Au
B)Ag
C)Si
D)Sb

Question 67

Lead is represented by what atomic symbol?

A)Rb
B)Tb
C)Pb
D)Lb

Question 68

Which is the atomic symbol that corresponds to the element name arsenic?

A)As
B)Ar
C)At
D)Sb

Question 69

What is the atomic symbol that corresponds to the element mercury?

A)Mo
B)Ma
C)H
D)Hg

Question 70

The atomic symbol that corresponds to the name ruthenium is:

A)Rh
B)Ru
C)R
D)Re

Question 71

Which atomic symbol corresponds to the element bromine?

A)B
B)Si
C)Br
D)Bi

Question 72

The atomic symbol that corresponds to the name boron is:

A)B
B)Br
C)Bi
D)Bu

Question 73

What atomic symbols correspond to carbon, copper, and cobalt?

A)Co, C, and Sb
B)C, Ca, and Co
C)Ca, Cu, and Co
D)C, Cu, and Co

Question 74

The atomic symbols that correspond to bromine, boron, and bismuth are:

A)Ba, B, and Bi.
B)Br, B, and Bi.
C)Br, Ba, and Bi.
D) Br, Bo, and

Question 75

Which of the following atomic symbols represent calcium, chromium, and carbon?

A)Ca, Cr, and C
B)Cl, Cr, and C
C)Ca, Cr, and Co
D)C, Ca, and Co

Question 76

Which atomic symbols correspond to hydrogen, mercury, and helium, in that order?

A)Hy, Hg, and He
B)H, Me, and He
C)H, Hg, and Hl
D)H, Hg, and He

Question 77

Which of the following atomic symbols represent the coinage metals copper, silver, and gold?

A)Co, Ag, and Au
B)Cu, Ag, and Ga
C)Cu, Ag, and Au
D)C, Ag, and Au

Question 78

The atomic symbols that correspond to chlorine, copper, and cobalt are:

A)C, Cu, and Co
B)Cl, Cu, and Co
C)Cl, C, and Co
D)Cl, Cu, and C

Question 79

The atomic symbols that correspond to sulfur, antimony, and silicon are:

A)S, Sb, and Si
B)Se, Sb, and Si
C)S, Se, and Si
D)S, Sb, and Se

Question 80

Which of the following elements are metals?

A)iron, lead, calcium
B)iron, lead, chlorine
C)iodine, lead, calcium
D)iron, phosphorus, calcium