Quiz

QUIZ

1. Organic chemistry involves several different elements interacting in different ways. Which is the least likely element to be seen in organic molecules?

a. Carbon b. Hydrogen c. Oxygen d. Nitrogen

Answer: d. Organic molecules can consist of any of these but nitrogen is the least likely to be seen in an organic molecule.

2. An organic molecule defined as one that has no aromatic rings is referred to as what?

a. Aliphatic b. Hydrocarbon c. Alkane d. Cycloalkane

Answer: a. An aliphatic molecule is one that does not contain an aromatic ring. It does have the capability of forming a ring itself that is not aromatic.

3. What is the structure called bromomethyl?

a. Br2CHb. Br3Cc. BrCH2d. Br4-

Answer: c. You have to assume that, unless it is specified, there will be just one bromine atom added as part of the methyl group. This leads to BrCH2- as the only real option.

4. What type of carbon bonding is seen with an alkyne organic molecule?

a. Single carbon bonds b. At least one double bond c. Two double bonds d. At least one triple bond

Answer: d. An alkyne is identified as having a least one triple bond connecting two carbon atoms. The simplest one would be C2H2.

5. A cis-isomer is what type of isomer?

a. Functional isomer b. Geometric isomer c. Mirror image isomer d. Position isomer

Answer: b. Cis-isomers are a type of geometric isomer that is different from a trans-isomer (which is also a type of geometric isomer).

6. What is the opposite of a trans-isomer?

a. R-enantiomer b. S-enantiomer c. E isomer d. Z isomer

Answer: d. The Z isomer is the same thing as a cis-isomer, which is the opposite of a trans isomer. Enantiomers are different from the geometric isomers that involve E or trans isomers or Z isomers.

7. Which of the following functional groups in organic chemistry do not have a nitrogen as part of the functional group?

a. Amide b. Amine c. Nitrile d. Carboxylic acid

Answer: d. Carboxylic acid compounds have COOH molecules as part of them. The rest have some functional group that has nitrogen in the group.

8. What type of molecule is identified as being an RCO configuration?

a. Ketone b. Aldehyde c. Carboxylic acid d. Amide

Answer: a. The ketone is an RCO molecule with a double bond between the carbon atom and an oxygen molecule. This gives the carbon atom two “spots” for attaching to some other side chains.

9. What is not a part of an amino acid?

a. Ketone side chain b. Carboxylic acid side chain c. Amino side chain d. R side chain

Answer: a. Amino acids have an R side chain, an amino side chain and a carboxylic acid side chain. They do not generally have a ketone side chain as a general part of their structure (although technically, a ketone side chain could be part of an R chain, which can be a variety of things).

10. Carbohydrates each contain a molecule of these atoms, except for what atom?

a. Carbon b. Hydrogen c. Oxygen d. Nitrogen

Answer: d. The thing that makes carbohydrates unique is that they only contain carbon, hydrogen, and oxygen, with most carbohydrates in nature being C6 carbohydrates, having six carbon atoms.