Principles of Chemistry - CHEM 122 - Practice Exam Unit 2 Notes

Multiple Choice Questions

Inorganic Compounds

• Which of the following is most likely to be an inorganic compound?
  • a. A compound which is a gas at room temperature.
  • b. A compound which gives a separate layer when poured into water.
  • c. A compound which is flammable.
  • d. A compound which is soluble with water.

Hydrocarbons Definitions

• A compound containing carbon and hydrogen with only single bonds is called a:
  • a. isomer
  • b. unsaturated hydrocarbon
  • c. saturated hydrocarbon
  • d. aromatic compound

Molecular Structures

• CH${3}$-CH${3}$ is an example of a:
  • a. skeletal
  • b. complete
  • c. condensed
  • d. molecular

Structural Isomers

• 2-methylpentane is a structural isomer of:
  • a. pentane
  • b. hexane
  • c. benzene
  • d. 2-methyl-1

Branched Alkanes

• Which of the following is a branched alkane?
  • a. CH${3}$-CH-CH${3}$
  • b. CH${2}$ CH${2}$ CH$_{2}$
  • c. CH$_{3}$
  • d. CH$_{3}$

Unsaturated Hydrocarbons

• Which of the following is not an unsaturated hydrocarbon?
  • a. hexane
  • b. 1-octene
  • c. ethyne

Types of Reactions

• The addition of HCl to ethene is an example of which kind of reaction?
  • a. hydration
  • b. alkylation
  • c. halogenation
  • d. hydrohalogenation

IUPAC Naming

• The correct (IUPAC) name for a benzene ring with a -CH${2}$CH${3}$ group attached to the ring is:
  • a. benzylethane
  • b. ethylbenzene
  • c. phenylbenzene
  • d. 1-dimethyl

Hydrogen Addition

• How many hydrogen atoms would need to be added to C=C to make a complete structural formula?
  • a. 12
  • b. 13
  • c. 14
  • d. 15

Structural Isomers Questions

Question 10

• Which of the following pairs are structural isomers?
  • a. CH${3}$ and CH${3}$
  • b. CH${3}$-CH${2}$-CH${2}$ and CH${3}$-CH$_{3}$
  • c. CH${3}$ and CH${2}$-CH$_{3}$
  • d. CH${3}$-CH${3}$ and CH${2}$-CH${2}$-CH$_{3}$

Question 11

• Which of the following pairs are structural isomers?
  • a. CH${3}$-CH-CH${3}$ and CH${3}$-CH${2}$-CH$_{3}$
  • b. CH${3}$ and CH${2}$-CH$_{3}$
  • c. CH${3}$-CH${3}$ and CH${3}$-CH${3}
  • d. CH${2}$-CH${2}$-CH${3}$ and CH${3}$-CH$_{3}$

Hydrogenation Reactions

• The hydrogenation of an alkene produces a:
  • a. alkane
  • b. alkyne
  • c. isomer
  • d. cis or trans structure

Isomers Naming

• Which of the following must be named as a cis or trans isomer?
  • a. pentane
  • b. 2-pentene
  • c. 1-pentene
  • d. 2-butyne

Nitro Group

• The -NO$_{2}$ substituent is called:
  • a. cyano
  • b. phenyl
  • c. amino
  • d. nitro

Aromatic Compounds

• Which of the following compounds would be classified as aromatic?
  • a. naphthalene
  • b. cis-3-hexene
  • c. cyclopentane
  • d. chloromethane

Hydrocarbon Classification

• A hydrocarbon with 3 carbon atoms and 8 hydrogen atoms is a:
  • a. aromatic compound
  • b. unsaturated hydrocarbon
  • c. alkane
  • d. alkyne

Balanced Equations

Incomplete Combustion

• Write the balanced equation for the incomplete combustion of cyclobutane (C${4}$H${8}$).

Complete Combustion

• Write the balanced equation for the complete combustion of hexane (C${6}$H${14}$).

Reaction Completion Problem

• Complete the following reaction:

  • CH${3}$-CH${2}$-CH=CH${2}$ + Br${2}$

• Complete the following reaction:

  • CH${3}$-CH-CH${2}$ + H$_{2}$O

Structural Product Drawings

• Draw the condensed structure of the organic product for the following reactions. If no reaction occurs, write "no reaction".

Reaction 21

• CH$_{3}$-1-CH)

Reaction 22

• CH${3}$-C-CH${3}$

Structural Isomers Analysis

• DRAW and NAME 4 different structural isomers of the molecular formula: C${7}$H${16}$

Compound Naming

• Give the name of the following compounds:
  • 27. CH${3}$-CH${2}$-CH${2}$-CH-CH-CH${3}$
  • 28. CH${2}$-CH${2}$-CH$_{3}$
  • 29. SH
  • 30. CN
  • 31. CH${3}$-CH-CH${2}$-CH-CH$_{3}$
  • 32. H
  • 33. CH${3}$-CH${2}$-CH$_{3}$