Organic Chemistry : Identifying Other Organic Compounds
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Example Question #41 : Organic Functional Groups And Molecules
How many conjugated atoms are present in the given molecule?
A conjugated molecule is one that has its atoms arranged in such a way that allows p orbitals to lie parallel to each other. This allows for electron delocalization, which ultimately provides increased stability for the molecule. To find conjugated atoms, look for alternating single and multiple bonds. The circled carbon atoms are the only ones that are conjugated in this molecule.
Example Question #42 : Organic Functional Groups And Molecules
How many hydrogens are present in the given molecule?
Each alcohol group provides a hydrogen. Additionally, there are 24 "hidden" hydrogens. Refer to the photo below to see where these "hidden" hydrogens are located.
Example Question #43 : Organic Functional Groups And Molecules
What type of orbital is the lone pair on the nitrogen found in?
sp3
p
sp
sp2
sp2
In this molecule, the carbon that is directly attached to the nitrogen and the nitrogen itself are sp2 hybridized. This means that, within this bond, there are three sp2 orbitals present and the lone pair on the nitrogen occupies one of them.
Example Question #4 : Identifying Other Organic Compounds
What is the general formula of an ether?
Example Question #5 : Identifying Other Organic Compounds
List all functional groups in the given molecule.
Ether, carboxylic acid, alkyl halide
Ester, carboxylic acid, alkyl halide, methyl
Ether, alcohol, Acid anhydride, ketone
Ester, alcohol, ketone
Ether, carboxylic acid, alkyl halide
The first carbon that is attached to the chlorine is an alkyl halide. The oxygen that is directly attached to two carbons is an ether. Lastly, the 
Example Question #43 : Organic Functional Groups
Which functional groups are present in the pictured molecule?
Phenyl, ketone, amine, acid anhydride
Phenyl, aldehyde, amine, acid anhydride
Phenyl, ketone, amide, ester
Phenyl, ketone, amine, ester
Phenyl, ketone, amine, acid anhydride
This picture shows each functional group in its own box.
1. Phenyl
2. Ketone
3. Amine
4. Acid anhydride
Example Question #2 : Identifying Other Organic Compounds
Which of the following compounds has the molecular formula, 
Hexyne
Benzene
Hexane
Hexene
Hexene
The molecular formula 
Example Question #3 : Identifying Other Organic Compounds
What kind of organic compounds contain an 
All of these
Aldehydes
Alcohols
Ketones
Alcohols
By definition, alcohols are compounds that contain an 
Example Question #4 : Identifying Other Organic Compounds
Ethanol 
Tertiary alcohol
Secondary alcohol
Organic acid
Primary alcohol
Primary alcohol
Ethanol (or ethyl alcohol) is characterized as a primary alcohol since there is only one carbon-containing group that is directly attached to the carbon containing the 
Example Question #7 : Identifying Other Organic Compounds
What is the unsaturation number of cholic acid (shown), which is a steroid?
The unsaturation number is equal to the number of rings and pi bonds in a molecule. Here, there are 4 rings and 1 double bond, so the unsaturation number is 5. No formula is needed to calculate unsaturation number when a structural formula is given.
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