This is a 60-question,multiple-choicequiz covering the topics listed below.

It comes with a 2-hour video showing a detailed step-by-step solution to all the questions. It’s a must-watch, master course video!

Lewis Structures

• • The electron-dot representation of molecules is the foundation for understanding the structure and bonding in organic chemistry. The questions in this quiz are particularly focused to relating Lewis structures to the bond-line structures. For introductory Lewis structure quizzes, you can first take theGeneral Chemistry Overview quiz where you can also practice your skills in the octet rule, formal charges, the VSEPR and sp,sp², andsp³ hybridization theories.

Bond-Line Structures

• Bond-line or the zig-zag structures is the “language” of organic chemistry. The questions in this quiz will help you practice the general rules of drawing bond-line structures, counting the number of carbon and hydrogen atoms and the important skill set of converting between Lewis structures, condensed structures and bond-line structures.

Here is an example question:

Choose the correct bond-line structure for the following condensed structures:

Constitutional Isomers

• These are the simplest of all the isomers and it is important to distinguish constitutional isomers from identical compounds as they might simply be drawn differently. Learning the degrees of unsaturation will help you quickly identify the constitutional isomers based on the presence of double bonds, triple bonds or rings.

Example question

All of these are constitutional isomers except:

Functional Groups

• This the alphabet of organic chemistry. While it is not so difficult to learn all the functional groups in organic chemistry, it certainly takes time. Taking a quiz on functional groups will be an “easy” way of making sure you are able to recognize them in small and large molecules.

Example question:

Metoprolol is a medication used to treat high blood pressure.

Match each label with the correct functional group.

Resonance Structures

• Have you mastered drawing your curved arrows yet? Do you notice when you are missing a lone pair on a resonance structure? What about violating the octet rule when pushing electrons to a carbon with a complete octet? Can you keep track of formal charges?

This quiz on resonance structures will help you find these out.

You can also practice identifying the more stable and important resonance forms that contribute the most to the resonance hybrid.

Example question:

Determine which resonance structure makes the greatest contribution to the resonance hybrid. I.e. which resonance form is more stable?

Curved Arrows

• Curved arrows are going to be everywhere and in everything you do in organic chemistry. They show the movement of electrons and since chemical reactions occur as a result of electron movement, curved arrows are the key to understanding the reaction mechanisms and resonance transformations in organic chemistry. Take this multiple-choice quiz to check if you can spot mistakes in curved arrow mechanisms.

Example question:

Localized and Delocalized Lone Pairs

• These definitions allow to distinguish between the lone pairs that are in resonance and the ones that are not. For the most part, you need to look for a pi bond to involve the lone pairs in resonance strictures. However, there some tricks to this. Particularly the concept of hybridization, where the atoms next to a pi bond adoptsp²-hybridization in order to have the lone pair of electrons in a p orbital.

Most questions have a hint linked to the topic of the question. And if you feel like more feedback would be needed, you can head to the topic index and look for additional resources.