Chapter 5 Exam Questions Carbon, Molecules, Footprints - 21st Century Chemistry 2e Complete Test Bank by Kimberley Waldron. DOCX document preview.

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Chapter 5 Exam Questions Carbon, Molecules, Footprints

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Chapter: Chapter 5

Multiple Choice, Essay, Fill-In-The-Blank

1. Graphene is composed of what element?

A) nitrogen

B) hydrogen

C) carbon

D) oxygen

E) sulfur

chaptername: 5

questiontype: Multiple Choice

section: 5.1

2. Choose the false statement.

A) Graphene is made up of only one element.

B) Graphene conducts current at a high rate of speed.

C) At the current time, graphene has limited use because it cannot be made in large pieces.

D) Graphene was first made by pulling a single layer from a sheet of graphite.

E) Single layers of graphite make up a sheet of graphene

chaptername: 5

questiontype: Multiple Choice

section: 5.1

3. Graphene can be described as

A) single sheets of carbon atoms that, when stacked together, make up graphite.

B) a 3-dimensional array of 60 carbon atoms.

C) stacks of covalently bonded carbon atoms arranged in a lattice structure.

D) the active ingredient in cough medicine.

E) a biological substance necessary for enzyme activation.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

4. Scientists were able to isolate a layer of graphene using

A) an electron microscope.

B) a pencil.

C) by reacting graphite with hydrochloric acid.

D) Scotch tape.

E) sub-zero temperatures.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

5. Carbon has special properties because

A) it has the same number of protons and electrons.

B) its small size.

C) its ability to bond to itself.

D) its ability to form both ionic and covalent bonds.

E) All of the above.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

6. Carbon and other elements in Period 2 are relatively small in size compared to other elements because

A) they have few electrons, and those electrons are held close to the nucleus.

B) the electrons in these elements take up less space than in other elements.

C) they are found mostly in biological systems.

D) they form both single, double, and triple bonds, and must be small in order to do this.

E) All of the above.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

7. Which is the smallest atom?

A) Sr

B) C

C) F

D) Na

E) Ge

chaptername: 5

questiontype: Multiple Choice

section: 5.1

8. Which is the largest atom?

A) Al

B) As

C) Br

D) Rb

E) Mg

chaptername: 5

questiontype: Multiple Choice

section: 5.1

9. In total, each carbon atom can make how many bonds to other atoms?

A) 2

B) 3

C) 4

D) 5

E) 6

chaptername: 5

questiontype: Multiple Choice

section: 5.1

10. When carbon makes bonds to four atoms, the shape is almost always

A) an octagon.

B) tetrahedron-like.

C) triangular.

D) a pentagon.

E) None of the above.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

11. In the methane molecule, CH4, each of the H–C–H angles in the molecular structure has an identical value: exactly 109.5 degrees. The shape of molecules with bond angles of 109.5 degrees are known as

A) squares.

B) rectangles.

C) tetrahedrons.

D) pentagons.

E) quadrilaterals.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

12. In the methane molecule, there is a total of how many lone pairs?

A) 2

B) 4

C) 8

D) 18

E) None

chaptername: 5

questiontype: Multiple Choice

section: 5.1

13. In a molecule of CBr4, there is a total of how many lone pairs?

A) 4

B) 8

C) 12

D) 24

E) 36

chaptername: 5

questiontype: Multiple Choice

section: 5.1

14. Diamond is an example of a type of structure known as a

A) lattice.

B) network solid.

C) metal.

D) supersolid.

E) buckyball.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

15. Diamond is a very hard structure because

A) the network of covalent bonds extends in all directions.

B) it has a sea of electrons, which make it extremely durable.

C) it has layers of carbon that slide easily over each other.

D) it forms ionic bonds between each of the carbon atoms, and these bonds are difficult to break.

E) it takes millions of years to break down.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

16. Diamond is an unreactive substance because

A) the ionic bonds present in diamond are hard to break.

B) the lone electrons around each carbon are balanced equally between all the carbon atoms present.

C) carbon atoms present in diamond are smaller and more stable than other carbon atoms.

D) each carbon atom has a full octet of electrons.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

17. The shape of the SiH4 molecule would be

A) a triangle.

B) a tetrahedron.

C) a pentagon.

D) an octagon.

E) none of these.

chaptername: 5

questiontype: Multiple Choice

section: 5.1

18. What is the number of shared electrons in one covalent bond?

A) 2

B) 4

C) 6

D) 8

E) 10

chaptername: 5

questiontype: Multiple Choice

section: 5.2

19. Which of the following molecules would contain double or triple bonds?

A) C2H6

B) CH4

C) C2H2

D) HF

E) H2O

chaptername: 5

questiontype: Multiple Choice

section: 5.2

20. The Lewis dot structure shown here is incorrect because

A) it has the wrong number of valence electrons.

B) the carbon atoms have an incomplete octet of electrons.

C) the lone electrons make the molecule unstable.

D) molecules cannot contain unpaired electrons.

chaptername: 5

questiontype: Multiple Choice

section: 5.2

21. The correct chemical formula for the molecule shown is

An illustration shows the structural formula of a compound. The structure has a nine-carbon backbone, in which C 1 is bound to a hydroxyl group, in which the oxygen atom carries two lone pairs of electrons, and the chain has the following substituents: C 3 and C 7 carbon atoms are each bound to a methyl group, and the chain has four alternate double bonds between C 2 and C3, C 4 and C 5, C 6 and C 7, and C 8 and C 9. C 9 carbon atom of the chain is bound to C 1 of a cyclohexene ring. In the cyclohexene ring, C 2 is bound to a methyl group and C 6 is bound to two methyl groups.

A) C20H30O

B) C19H20O

C) C17H27O

D) C19H19O

chaptername: 5

questiontype: Multiple Choice

section: 5.2

22. The correct chemical formula for the molecule shown is

A) C8H10O2

B) C10H10O2

C) C12H24O2

D) C18H32O2

chaptername: 5

questiontype: Multiple Choice

section: 5.2

23. How many double bonds are there in the molecule, represented below?

An illustration shows the structural formula of a compound. The structure has a nine-carbon backbone, in which C 1 is bound to a hydroxyl group, in which the oxygen atom carries two lone pairs of electrons, and the chain has the following substituents: C 3 and C 7 carbon atoms are each bound to a methyl group, and the chain has four alternate double bonds between C 2 and C3, C 4 and C 5, C 6 and C 7, and C 8 and C 9. C 9 carbon atom of the chain is bound to C 1 of a cyclohexene ring. In the cyclohexene ring, C 2 is bound to a methyl group and C 6 is bound to two methyl groups.

A) 4

B) 5

C) 3

D) 6

chaptername: 5

questiontype: Multiple Choice

section: 5.2

24. What is the chemical formula for the following molecule?

An illustration shows the structural formula of pantothenic acid. The structure has eight groups, in which the first group is carboxylic acid (C O O H), second and third groups are methylene groups (C H subscript 2), fourth group is imidogen, and the fifth group is a ketone (C O). C 6 is bound to a hydrogen atom and a hydroxyl group (O H), C 7 is bound to two methyl groups (C H subscript 3) and methylene group (C H subscript 2) of C 8 is bound to a hydroxyl group (O H).

A) C8H16O3N

B) C9H15O3N

C) C9H17O4N

D) C9H12O4N

chaptername: 5

questiontype: Multiple Choice

section: 5.2

25. It says in your text that carbon generally does not form two double bonds. Instead it forms a single bond and a triple bond. What is one common exception to this statement?

A) CO

B) CO2

C) CO32–

D) CH2O

chaptername: 5

questiontype: Multiple Choice

section: 5.2

26. Explain why graphite has vastly different properties from diamond, even though they are both composed solely of carbon.

chaptername: 5

questiontype: Essay

section: 5.2

Feedback: The answer should include the following information: Each atom in diamond forms four equivalent bonds to four other carbon atoms. This repeating system of covalent bonds creates a network solid, creating a very strong overall structure. Each carbon atom in a layer of graphite forms two single bonds and a double bond, resulting in very strong layers of graphite but weak interactions between each layer.

27. Graphite is a slippery solid, in contrast to diamond. Both graphite and diamond contain only carbon atoms. Graphite has these properties because

A) Graphite consists of layers of carbon atoms; each layer is weakly bonded to other layers.

B) The carbon atoms in graphite form triple bonds in each layer and single bonds between the layers.

C) Each layer of graphite exists as a separate entity and is not joined to layers above and below it.

D) It contains material that makes it a basic substance and thus slippery.

chaptername: 5

questiontype: Multiple Choice

section: 5.2

28. Rank the length of bonds between carbon atoms in each molecule, starting with the shortest:

C2H6, C2H4, C2H2.

A) C2H2, C2H4, C2H6

B) C2H6, C2H4, C2H2

C) C2H4, C2H6, C2H2

D) C2H4, C2H2 C2H6

chaptername: 5

questiontype: Multiple Choice

section: 5.2

29. Rank the strength of bonds between carbon atoms in each molecule, starting with the weakest:

C2H6, C2H4, C2H2.

A) C2H6, C2H4, C2H2

B) C2H2, C2H4, C2H6

C) C2H4, C2H6, C2H2

D) C2H4, C2H2 C2H6

chaptername: 5

questiontype: Multiple Choice

section: 5.2

30. True or False: The amount of energy needed to break a double bond is less than that required to break a single bond because the double bond is shorter.

A) true

B) false

chaptername: 5

questiontype: Multiple Choice

section: 5.2

31. True or False: 1.634 attojoules would be required to break all the carbon-carbon double bonds in the molecule shown here.

An illustration shows the structural formula of an alkene. A six-carbon chain has C 3 double bound to C 4, C 1 and C 6 carbon atoms are methyl groups, and C 2 and C 5 carbon atoms are methylene groups.

A) true

B) false

chaptername: 5

questiontype: Multiple Choice

section: 5.2

32. Which of the following are allotropes of carbon?

A) diamond

B) graphite

C) graphene

D) all of the above

chaptername: 5

questiontype: Multiple Choice

section: 5.2

33. A buckyball is a special carbon structure containing how many carbon atoms?

A) 4

B) 8

C) 12

D) 60

E) 100

chaptername: 5

questiontype: Multiple Choice

section: 5.2

34. A carbon buckyball is similar in shape to what common item?

A) a loaf of bread

B) a pencil

C) a soccer ball

D) a tennis ball

E) an egg

chaptername: 5

questiontype: Multiple Choice

section: 5.2

35. CO2 is the most notorious greenhouse gas because

A) it is more efficient than any other gas at trapping heat.

B) it is released in larger quantities than other greenhouse gases.

C) it lasts longer in the atmosphere than other greenhouse gases.

D) it is produced by both humans and animals.

E) it has existed longer than any other gas.

chaptername: 5

questiontype: Multiple Choice

section: 5.2

36. Even though an item such as a banana does not burn well, it still has a carbon footprint. Select the step that does not leave a carbon footprint.

A) producing a banana

B) harvesting a banana

C) transporting and storing a banana.

D) eating a banana

chaptername: 5

questiontype: Multiple Choice

section: 5.2

37. The first product to display the Carbon Trust logo was a bag of potato chips made in England by the Walkers Company. Why did the farmers harvesting the potatoes for these chips store the potatoes in humidified buildings?

A) It made the chips crisper.

B) It allowed them to store the chips for a longer time.

C) It increased the mass of the potatoes, thus increasing the amount they got paid.

D) It lowered the carbon footprint.

E) None of the above

chaptername: 5

questiontype: Multiple Choice

section: 5.2

38. According to your text, the planet is warming because

A) CO2 emissions are rising.

B) the earth is tilted more closely to the sun.

C) carbon sequestration doesn’t work

D) the glaciers are melting.

E) there are increased number of hurricanes, leading to increased air movement and greater temperatures.

chaptername: 5

questiontype: Multiple Choice

section: 5.2

39. A heteroatom is an atom attached to a hydrocarbon skeleton. A heteroatom is most likely to include one or more of which set of elements?

A) Ag, Au, Zn

B) S, N, O

C) Na, Ca, Li

D) He, Ne, Ar

E) Sn, Pb, As

chaptername: 5

questiontype: Multiple Choice

section: 5.3

40. Based on the following line structure, determine the chemical formula for the molecule.

An illustration shows the skeletal formula of an alkene. A six-carbon chain, in which C 3 is double bound to C 4 and C 1 is bound to a bromine (uppercase B lowercase R) atom. C 6 is a methyl group.

Formula: _____

chaptername: 5

questiontype: Fill-In-The-Blank

section: 5.3

41. Based on the following line structure, determine the chemical formula for the molecule.

An illustration shows a skeletal structure of an alcohol. A six-carbon chain, in which C 2 is single bound to a hydroxyl group (O H). C 1 and C 6 are methyl groups, and C 3 through C 5 are methylene (C H subscript 2).

Formula: _____

Ans B: C6H14O

chaptername: 5

questiontype: Fill-In-The-Blank

section: 5.3

42. How many carbon atoms are in the following molecule?

An illustration shows the skeletal structure of an aromatic alcohol. A benzene ring has C 4 bound to a four carbon chain. C 1 of the four-carbon chain is bound to a hydroxyl group (O H).

A) 4

B) 8

C) 10

D) 7

chaptername: 5

questiontype: Multiple Choice

section: 5.3

43. Nitrogen will make how many bonds to other atoms?

A) 2

B) 3

C) 4

D) 5

E) 1

chaptername: 5

questiontype: Multiple Choice

section: 5.3

1010

10

1

44. The functional group in the following molecule is a(n) _____.

An illustration shows the structural formula of ethanoic acid. A two carbon chain in which C 1 is a carboxyl group (carbon double bound to an oxygen atom and single bound to O H). C 2 is a methyl group, in which one of the hydrogen atoms is bound by a wedge bond and the other two hydrogen atoms is bound by single bonds.

chaptername: 5

questiontype: Fill-In-The-Blank

section: 5.4

45. The functional group in the following molecule is a(n) _____.

An illustration shows the skeletal structure of a diamine. A five-carbon chain which has C 1 and C 5 each bound to an amino group (N H subscript 2).

chaptername: 5

questiontype: Fill-In-The-Blank

section: 5.4

46. The functional group in the following molecule is a(n) _____.

chaptername: 5

questiontype: Multiple Choice

section: 5.4

47. One element that is often associated with bad smelling odors such as is found in garlic and onions is

A) sodium

B) sulfur

C) selenium

D) phosphorus

E) fluorine

chaptername: 5

questiontype: Multiple Choice

section: 5.4

48. Natural gas has odorant molecules added to it to assist in leak detection. What element is commonly a part of these molecules?

A) nitrogen

B) lithium

C) calcium

D) helium

E) sulfur

chaptername: 5

questiontype: Multiple Choice

section: 5.4

49. Which functional group is widely used as a building block in the synthesis of plastics?

A) carboxylic acids

B) alcohols

C) sulfur compounds

D) amines

E) none of these

chaptername: 5

questiontype: Multiple Choice

section: 5.4

50. Which functional group has a particular geometry that causes it to affect the brain and is often a component of illegal and legal drugs?

A) carboxylic acids

B) alcohols

C) sulfur compounds

D) amines

E) none of these

chaptername: 5

questiontype: Multiple Choice

section: 5.4

51. The functional group discussed in the chapter, which is found in both of the following organic molecules, is _____.

A two part illustration of the structural formulae of formic acid and acetic acid (vinegar). Formic acid has a central carbon atom single bound to a hydrogen atom on the left, single bound to a hydroxyl group (O H) on the right, and double bound to an oxygen atom at the top. Acetic acid has a central carbon atom single bound to a methyl group (C H subscript 3) on the left, single bound to a hydroxyl group on the right, and double bound to an oxygen atom at the top.

chaptername: 5

questiontype: Multiple Choice

section: 5.4

52. At the time that your text was published, what year was the hottest in U.S. history?

A) 1999

B) 2001

C) 2005

D) 2007

E) 2012

chaptername: 5

questiontype: Multiple Choice

section: 5.4

Document Information

Document Type:
DOCX
Chapter Number:
5
Created Date:
Aug 21, 2025
Chapter Name:
Chapter 5 Carbon, Molecules, Footprints
Author:
Kimberley Waldron

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