Question 1

Which property of carbon allows it to form a vast diversity of organic molecules?

Accepted Answer

Its tetravalency, allowing four covalent bonds with other atoms

Question 2

Which of the following best describes the bonding in an alkene?

Accepted Answer

At least one carbon-carbon double bond

Question 3

Which of the following is a correct general formula for alkanes?

Accepted Answer

$$\mathrm{C}_n\mathrm{H}_{2n+2}$$

Question 4

Which of the following statements correctly contrasts the reactivity of alkanes, alkenes, and alkynes?

Accepted Answer

Alkenes and alkynes are more reactive than alkanes because of their multiple bonds.

Question 5

Which industrial use is correctly matched with the type of hydrocarbon?

Accepted Answer

Alkene: Used in the production of polyethylene

Question 6

Which of the following best explains why carbon can form chains and rings in organic molecules?

Accepted Answer

Carbon atoms are small and can form strong covalent bonds with other carbon atoms.

Question 7

A hydrocarbon with the formula $$\mathrm{C}_4\mathrm{H}_6 is $$most likely which type of compound?

Accepted Answer

Alkyne

Question 8

Which of the following reactions is most characteristic of alkenes?

Accepted Answer

Addition

Question 9

Which of the following is a real-world application of ethyne (acetylene), an alkyne?

Accepted Answer

Used in welding torches due to its high flame temperature

Question 10

Which of the following best describes the difference in structure between alkanes, alkenes, and alkynes?

Accepted Answer

Alkanes have only single bonds, alkenes have at least one double bond, and alkynes have at least one triple bond.

Question 11

Which of the following best explains why alkenes are more reactive than alkanes?

Accepted Answer

Alkenes have a double bond, which is more easily broken than a single bond.

Question 12

Which of the following is a correct example of an alkane?

Accepted Answer

Propane ($$\mathrm{C}_3\mathrm{H}_8)$$

Question 13

Which of the following is a common use of methane, an alkane?

Accepted Answer

As a fuel for heating and cooking

Question 14

Which of the following best describes the industrial importance of ethene (ethylene)?

Accepted Answer

It is used as a monomer to produce plastics like polyethylene.

Question 15

Which of the following statements about the reactivity of hydrocarbons is correct?

Accepted Answer

Alkanes are generally unreactive except under extreme conditions.

Question 16

A compound with the formula $$\mathrm{C}_5\mathrm{H}_{10} is $$most likely which type of hydrocarbon?

Accepted Answer

Alkene

Question 17

Which of the following is a correct statement about the industrial use of alkanes?

Accepted Answer

Alkanes are commonly used as fuels in heating and transportation.

Question 18

Which of the following best explains why alkynes are more reactive than alkanes?

Accepted Answer

Alkynes have a triple bond, which is more reactive than a single bond.

Question 19

Which of the following is a correct example of an alkyne?

Accepted Answer

Ethyne ($$\mathrm{C}_2\mathrm{H}_2)$$

Question 20

Which of the following best describes the difference in industrial uses between alkanes, alkenes, and alkynes?

Accepted Answer

Alkanes are mainly used as fuels, alkenes as monomers for plastics, and alkynes in welding.

Introduction to Organic Chemistry: Alkanes, Alkenes, and Alkynes

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