Question 1

Which of the following statements best describes an organic compound?

Accepted Answer

A compound that always contains carbon and hydrogen, and often other elements such as oxygen, nitrogen, or sulfur.

Question 2

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

Accepted Answer

Butane

Question 3

Which of the following best explains why the carbon atoms in an alkane are arranged in a zigzag chain?

Accepted Answer

Each carbon atom forms four single bonds with the maximum separation due to tetrahedral geometry.

Question 4

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

Accepted Answer

$$\mathrm{C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O}$$

Question 5

Which of the following functional groups is present in all alcohols?

Accepted Answer

Hydroxyl group ($$\mathrm{-OH})$$

Question 6

Given the following two structural formulas, determine if they are isomers or the same molecule:

1. $$\mathrm{CH_3CH_2CH_2CH_3}
2$$. $$\mathrm{CH_3CH(CH_3$)CH_3$}$$

Accepted Answer

They are structural isomers.

Question 7

Which of the following compounds is an example of a saturated hydrocarbon?

Accepted Answer

Cyclohexane ($$\mathrm{C_6H_{12}})$$

Question 8

Which of the following best describes a functional group?

Accepted Answer

A specific group of atoms within a molecule that is responsible for the characteristic chemical reactions of that molecule.

Question 9

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

Accepted Answer

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

Question 10

Which of the following statements about alkanes is FALSE?

Accepted Answer

Alkanes are more reactive than alkenes.

Question 11

Which of the following is the correct IUPAC name for the compound with the formula $$\mathrm{CH_2$=$$CHCH_3$$}$$?

Accepted Answer

Propene

Question 12

Which of the following best describes a cis-trans isomer?

Accepted Answer

Compounds with the same molecular formula and connectivity but different spatial arrangements around a double bond.

Question 13

Which of the following is the correct condensed structural formula for cyclopentane?

Accepted Answer

$$\mathrm{(CH_2$)_5}$$

Question 14

Which of the following compounds contains a carbonyl group?

Accepted Answer

Acetone ($$\mathrm{CH_3COCH_3})$$

Question 15

Which of the following is the correct IUPAC name for the compound with the formula $$\mathrm{CH_3C \equiv CH}$$?

Accepted Answer

Propyne

Question 16

Which of the following best describes the product of the hydration of ethene ($$\mathrm{C_2H_4}$$)?

Accepted Answer

Ethanol ($$\mathrm{C_2H_5OH})$$

Question 17

Which of the following is a property of aromatic compounds?

Accepted Answer

They contain a ring structure with alternating double and single bonds, such as benzene.

Question 18

Which of the following is the correct IUPAC name for the compound with the formula $$\mathrm{CH_3CH_2COOH}$$?

Accepted Answer

Propanoic acid

Question 19

Which of the following best describes an addition reaction?

Accepted Answer

A reaction in which atoms are added to the carbon atoms of a double or triple bond.

Question 20

Which of the following is the correct condensed structural formula for the product of the addition of $$\mathrm{H_2$} to 2-$$butene ($$\mathrm{CH_3CH=$$CHCH_3$$}$$)?

Accepted Answer

$$\mathrm{CH_3CH_2CH_2CH_3}$$

Chapter 11: Introduction to Organic Chemistry – Hydrocarbons and Functional Groups

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