Question 1

Which of the following statements best distinguishes an organic compound from an inorganic compound?

Accepted Answer

Organic compounds always contain carbon and hydrogen, and typically have covalent bonds, while inorganic compounds may lack carbon and often have ionic bonds.

Question 2

How many bonds does every carbon atom form in a stable organic compound?

Accepted Answer

$$4$$

Question 3

Which of the following is a saturated hydrocarbon?

Accepted Answer

Hexane

Question 4

Given the molecular formula $$\mathrm{C_4H_{10}}$$, which of the following is a correct condensed structural formula for a branched isomer?

Accepted Answer

$$\mathrm{CH_3CH(CH_3$)CH_3$}$$

Question 5

Which of the following best describes a structural isomer?

Accepted Answer

Molecules with the same molecular formula but different connectivity of atoms.

Question 6

Which of the following line-angle formulas represents cyclopentane?

Accepted Answer

A five-sided polygon with no double bonds.

Question 7

What is the IUPAC name for the following condensed structural formula: $$\mathrm{CH_3CH_2CH_2CH_3}$$?

Accepted Answer

Butane

Question 8

Which of the following molecules is a trans-isomer?

Accepted Answer

A molecule with two identical groups on opposite sides of a double bond.

Question 9

Which functional group is present in the molecule $$\mathrm{CH_3CH_2OH}$$?

Accepted Answer

Alcohol

Question 10

Which of the following reactions represents the hydrogenation of ethene?

Accepted Answer

$$\mathrm{CH_2$=CH_2$ + H_2$ \rightarrow CH_3CH_3}$$

Question 11

Which of the following best describes an alkene?

Accepted Answer

A hydrocarbon with at least one double bond between carbon atoms.

Question 12

Which of the following is the correct IUPAC name for a molecule with the condensed formula $$\mathrm{CH_3CH_2CH_2CH_2CH_3}$$?

Accepted Answer

Pentane

Question 13

A molecule has the formula $$\mathrm{C_5H_{10}}$$ and contains a ring. What is its correct classification?

Accepted Answer

Cyclopentane

Question 14

Which of the following is a product of the hydration of propene ($$\mathrm{CH_3CH=CH_2$}$$)?

Accepted Answer

$$\mathrm{CH_3CH(OH)CH_3$}$$

Question 15

Which of the following best describes a line-angle formula?

Accepted Answer

A formula where each vertex and line ending represents a carbon atom, and hydrogen atoms bonded to carbon are not shown.

Question 16

Which of the following molecules are structural isomers?

Accepted Answer

$$\mathrm{CH_3CH_2CH_2CH_3}$$ \ and \ $$\mathrm{CH_3CH(CH_3$)CH_3$}$$

Question 17

Which of the following best describes a cis-isomer?

Accepted Answer

A molecule with two identical groups on the same side of a double bond.

Question 18

Which of the following is the correct IUPAC name for a molecule with the condensed formula $$\mathrm{CH_3CH_2CH(CH_3$)CH_3$}$$?

Accepted Answer

2-Methylbutane

Question 19

A patient is exposed to $$\mathrm{$$CCl_4$$} ($$carbon tetrachloride), a compound used in dry cleaning. Based on its formula, how would you classify this compound?

Accepted Answer

An inorganic compound because it lacks hydrogen atoms bonded to carbon.

Question 20

Which of the following reactions is a halogenation reaction?

Accepted Answer

$$\mathrm{CH_2$=CH_2$ + Br_2$ \rightarrow CH_2BrCH_2Br}$$

Chapters 11, 12, and 14: Introduction to Organic Chemistry, Hydrocarbons, and Functional Groups

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