All Organic Chemistry Resources
Example Questions
Example Question #1 : Identifying Other Organic Compounds
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 #41 : Organic Functional Groups
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 #1 : Identifying Other Organic Compounds
What type of orbital is the lone pair on the nitrogen found in?
sp
sp2
sp3
p
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 #41 : Organic Functional Groups And Molecules
What is the general formula of an ether?
is the general formula of an ether.
Example Question #42 : Organic Functional Groups And Molecules
List all functional groups in the given molecule.
Ester, alcohol, ketone
Ether, alcohol, Acid anhydride, ketone
Ether, carboxylic acid, alkyl halide
Ester, carboxylic acid, alkyl halide, methyl
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 is a carboxylic acid.
Example Question #43 : Organic Functional Groups And Molecules
Which functional groups are present in the pictured molecule?
Phenyl, ketone, amine, ester
Phenyl, ketone, amine, acid anhydride
Phenyl, ketone, amide, ester
Phenyl, aldehyde, amine, acid anhydride
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 #51 : Organic Functional Groups And Molecules
Which of the following compounds has the molecular formula, ?
Hexyne
Hexane
Hexene
Benzene
Hexene
The molecular formula follows the rule regarding the molecular formula of alkenes:
. Therefore,
is the molecular formula for hexene.
Example Question #52 : Organic Functional Groups And Molecules
What kind of organic compounds contain an group?
Alcohols
Ketones
Aldehydes
All of these
Alcohols
By definition, alcohols are compounds that contain an (hydroxyl) group bonded covalently to the end of a hydrocarbon.
Example Question #53 : Organic Functional Groups And Molecules
Ethanol is characterized as what kind of alcohol?
Organic acid
Secondary alcohol
Primary alcohol
Tertiary 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 group.
Example Question #1 : 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.
All Organic Chemistry Resources
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