Question 1

Which of the following statements best describes a key difference between organic and inorganic compounds?

Accepted Answer

Organic compounds typically contain carbon and hydrogen, while inorganic compounds often contain metals and nonmetals.

Question 2

Which property is most typical of organic compounds?

Accepted Answer

Nonpolar and insoluble in water unless a polar group is present

Question 3

What is the IUPAC name for the following structure: $$CH_3$$-$$CH_2$$-$$CH_2$$-$$CH_3$$?

Accepted Answer

Butane

Question 4

Which of the following hydrocarbons would have the highest boiling point?

Accepted Answer

Heptane ($$C_7H_{16})$$

Question 5

Which of the following is a correct balanced chemical equation for the complete combustion of propane ($$C_3H_8$$)?

Accepted Answer

$$C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$$

Question 6

Which statement about cycloalkanes is correct?

Accepted Answer

Cycloalkanes are named by adding the prefix 'cyclo-' to the alkane name.

Question 7

Which of the following is a structural isomer of $$C_5H_{12} ($$pentane)?

Accepted Answer

2-methylbutane

Question 8

What is the product of the hydrogenation of 2-butene ($$CH_3-CH=CH$$-$$CH_3) $$using a platinum catalyst?

Accepted Answer

Butane ($$CH_3$$-$$CH_2$$-$$CH_2$$-$$CH_3)$$

Question 9

Which of the following best explains why alkanes are insoluble in water?

Accepted Answer

Alkanes are nonpolar and water is polar, so there is little attraction between their molecules.

Question 10

Which of the following is the correct condensed structural formula for 2-methylpentane?

Accepted Answer

$$CH_3-CH$$($$CH_3$$)-$$CH_2$$-$$CH_2$$-$$CH_3$$

Question 11

Which of the following statements about cis-trans isomers in alkenes is correct?

Accepted Answer

Cis-trans isomers occur because rotation around the double bond is restricted.

Question 12

Which of the following is the correct IUPAC name for $$CH_3$$-$$CH_2-C$$\equiv C-$$CH_3$$?

Accepted Answer

2-pentyne

Question 13

Which reaction is used to convert an alkene into an alcohol?

Accepted Answer

Hydration

Question 14

Which of the following best describes the structure of benzene?

Accepted Answer

A six-carbon ring with alternating single and double bonds, with electrons shared equally among the carbons.

Question 15

Which of the following is the correct IUPAC name for a benzene ring with chlorine atoms at positions 1 and 4?

Accepted Answer

1,4-dichlorobenzene (para-dichlorobenzene)

Question 16

Which of the following is a characteristic reaction of alkenes?

Accepted Answer

Addition reactions

Question 17

Which of the following best explains why branched-chain alkanes have lower boiling points than their straight-chain isomers?

Accepted Answer

Branched-chain alkanes have less surface area for intermolecular forces.

Question 18

Which of the following is the correct product of the hydration of propene ($$CH_2=CH$$-$$CH_3) $$with water and acid catalyst?

Accepted Answer

2-propanol ($$CH_3-CH(OH$$)-$$CH_3)$$

Question 19

Which of the following statements about aromatic compounds is correct?

Accepted Answer

Aromatic compounds are especially stable due to delocalized electrons in the ring.

Chapter 12: Introduction to Organic Chemistry – Hydrocarbons

Study Guide - Practice Questions