Question 1

Which of the following statements best explains why carbon is central to the structure of organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds, allowing for large, complex, and diverse molecules.

Question 2

What is the valence of nitrogen, and how does this affect its bonding in organic molecules?

Accepted Answer

Nitrogen has a valence of 3, allowing it to form three covalent bonds.

Question 3

Which element is most likely to form the backbone (skeleton) of organic molecules?

Accepted Answer

Carbon

Question 4

Why do organic compounds often contain hydrogen atoms in addition to carbon?

Accepted Answer

Hydrogen completes the valence requirements of carbon, allowing stable molecules to form.

Question 5

Given the electron configuration of carbon, how many electrons does it have in its outer shell?

Accepted Answer

4

Question 6

Which of the following best describes the diversity of organic molecules?

Accepted Answer

Organic molecules can range from simple molecules to colossal ones due to carbon's bonding versatility.

Question 7

Which of the following is a correct Lewis structure for a carbon atom showing its valence electrons?

Accepted Answer

A carbon atom with four electrons in its outer shell, each available for bonding.

Question 8

If a molecule contains only carbon and hydrogen, what type of compound is it?

Accepted Answer

A hydrocarbon

Question 9

Which of the following elements has a valence of 2 and is commonly found in organic molecules?

Accepted Answer

Oxygen

Question 10

A molecule has the formula $$C_6H_{12}O_6$. Which of the following statements is true about this molecule?

Accepted Answer

It contains carbon, hydrogen, and oxygen, and is likely an organic molecule.

Question 11

Which of the following best explains why carbon can form such a wide variety of molecules?

Accepted Answer

Carbon can form single, double, and triple bonds with itself and other elements.

Question 12

Which of the following is NOT a characteristic of organic compounds?

Accepted Answer

They always contain only carbon atoms.

Question 13

Which of the following best describes the role of carbon chains in organic molecules?

Accepted Answer

They form the skeletons of most organic molecules.

Question 14

Which of the following elements is most likely to form a molecule with the formula $$NH_3$$?

Accepted Answer

Nitrogen

Question 15

If a molecule contains a carbon atom bonded to two hydrogen atoms and one oxygen atom, what is the likely valence of the carbon atom in this molecule?

Accepted Answer

4

Carbon and the Molecular Diversity of Life: Organic Chemistry Foundations

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