Test Bank for Chemistry 8

Test Bank for Chemistry 8 th

Edition By Jill Kirsten Robinson, John McMurry, Robert Fay All Chapters 1-23, 100% Original Verified, A+ Grade) All Chapters Arranged

Reverse: 23- 1 1 / 4

Chemistry, 8e (Robinson/McMurry/Fay) Chapter 23 Organic and Biological Chemistry

23.1 Multiple Choice Questions

1) The most important characteristic of carbon atoms for forming organic molecules is

• ability to bond together to form long chains.
• ability to form multiple covalent bonds.
• use of hybrid orbitals.
• A and B

Answer: D

Diff: 2 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers Learning Obj: LO 23.1 Represent the chemical structure of alkanes as condensed structures or line drawings.Global Obj: G2 Demonstrate the ability to think critically and employ critical thinking skills.

2) Which of the following statements about properties of organic compounds is not correct?

• Most organic compounds are not soluble in water.
• Most organic compounds do not conduct electricity.
• Organic compounds have higher melting and boiling points than ionic compounds.
• Organic compounds have weak intermolecular forces.

Answer: C

Diff: 2 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers Global Obj: G2 Demonstrate the ability to think critically and employ critical thinking skills.

3) Another term for alkanes is

• alkenes.
• alkynes.
• saturated hydrocarbons.
• unsaturated hydrocarbons.

Answer: C

Diff: 1 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers Global Obj: G2 Demonstrate the ability to think critically and employ critical thinking skills.

4) Compounds that have the same formula but different molecular structures are called

• isoelectronic.
• isomers.
• isotones.
• isotopes.

Answer: B

Diff: 2 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers

Learning Obj: LO 23.2 Identify and draw constitutional isomers of alkanes.

Global Obj: G1 Demonstrate an understanding of the principles of scientific inquiry.

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5) Which of the following statements about isomers is false?

• All alkanes have branched chain isomers.
• As the number of carbon atoms increase in a compound, so do the number of possible isomers.
• Isomers have different physical properties.
• Isomers have the same formula but different molecular structures.

Answer: A

Diff: 2 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers

Learning Obj: LO 23.2 Identify and draw constitutional isomers of alkanes.

Global Obj: G2 Demonstrate the ability to think critically and employ critical thinking skills.

6) How many isomers are there for C5H12?

• 3
• 4
• 5
• 6

Answer: A

Diff: 2 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers

Learning Obj: LO 23.2 Identify and draw constitutional isomers of alkanes.

Global Obj: G2 Demonstrate the ability to think critically and employ critical thinking skills.

7) Which is the condensed structure of a straight-chain hydrocarbon?

• I
• II

C) III

• IV

Answer: A

Diff: 3 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers Learning Obj: LO 23.1 Represent the chemical structure of alkanes as condensed structures or line drawings.Global Obj: G2 Demonstrate the ability to think critically and employ critical thinking skills.; G3 Read and interpret graphs and data.

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8) Which condensed structure below representing an alkane is not correct?

A) CH3CH2CH3

B)

C) CH3CH2CH2CH3

D)

Answer: B

Diff: 3 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers Learning Obj: LO 23.1 Represent the chemical structure of alkanes as condensed structures or line drawings.Global Obj: G2 Demonstrate the ability to think critically and employ critical thinking skills.; G3 Read and interpret graphs and data.

9) Which of the following condensed structures represent the same molecule?

• I and II
• II and IV
• III and IV
• II and III

Answer: C

Diff: 3 Var: 1 Topic: Section 23.1 Organic Molecules and Their Structures: Constitutional Isomers

Learning Obj: LO 23.2 Identify and draw constitutional isomers of alkanes.

Global Obj: G2 Demonstrate the ability to think critically and employ critical thinking skills.; G3 Read and interpret graphs and data.

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