Question 1

Which property of carbon most directly explains its ability to form a large variety of organic molecules?

Accepted Answer

Its ability to form four covalent bonds with other atoms

Question 2

Organic chemistry is defined as the study of compounds that contain which element?

Accepted Answer

Carbon

Question 3

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule containing only carbon and hydrogen

Question 4

The number of covalent bonds an atom can form is generally equal to:

Accepted Answer

Its valence, or the number of unpaired electrons in its valence shell

Question 5

Which of the following is NOT a frequent bonding partner of carbon in organic molecules?

Accepted Answer

Sodium

Question 6

Which molecule is an example of a carbon atom bonded to atoms other than hydrogen?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 7

What is the molecular formula for urea?

Accepted Answer

$$CO(NH_2$)_2$$

Question 8

Which statement about isomers is correct?

Accepted Answer

Isomers have the same molecular formula but different structures

Question 9

Enantiomers are important in the pharmaceutical industry because:

Accepted Answer

Only one enantiomer may be biologically active

Question 10

Which of the following best explains why carbon chains form the skeletons of most organic molecules?

Accepted Answer

Carbon can form long chains and rings due to its ability to bond with up to four other atoms

Question 11

Which type of isomer has the same covalent bonds but differs in spatial arrangement around a double bond?

Accepted Answer

Cis-trans isomer

Question 12

Estradiol and testosterone are both steroids with a common carbon skeleton. What makes them different?

Accepted Answer

The chemical groups attached to the rings of the carbon skeleton

Question 13

Which of the following is a correct statement about the origin of life and organic chemistry?

Accepted Answer

Abiotic synthesis of organic compounds may have occurred near volcanoes

Question 14

Which chemical group is most likely to impart distinctive properties to an organic molecule?

Accepted Answer

The chemical groups attached to the carbon skeleton

Question 15

A fat molecule contains hydrocarbon components. What property do these components impart to fats?

Accepted Answer

They allow fats to release a large amount of energy when metabolized

Question 16

Which of the following is true about the overall percentages of major elements of life (C, H, O, N, S, P) in organisms?

Accepted Answer

They are quite uniform from one organism to another

Question 17

Which of the following best describes the electron configuration of carbon?

Accepted Answer

It gives carbon covalent compatibility with many different elements

Question 18

Which of the following is a real-world example of the importance of enantiomers?

Accepted Answer

Only one enantiomer of albuterol is effective in relieving asthma symptoms

Question 19

Which of the following is a correct statement about structural isomers?

Accepted Answer

They have the same molecular formula but different covalent arrangements of their atoms

Question 20

Which equation correctly represents the structure of carbon dioxide?

Accepted Answer

$$O=C=O$$

Carbon and the Molecular Diversity of Life: Study Notes

Study Guide - Practice Questions