Quiz

QUIZ

1. Which is the name for the alkane having three saturated carbon atoms?

a. Methane b. Pentane c. Propane d. Ethane

Answer: c. Propane has three saturated carbon atoms in a row. It goes by the molecular name of C3H8.

2. What is the name for the alkane that has five saturated carbon atoms?

a. Methane b. Pentane c. Propane d. Ethane

Answer: b. Five saturated carbon atoms in an alkane is called pentane. It is a C5H12 molecule when written out completely.

3. How does the parent carbon chain get chosen, according to IUPAC rules?

a. It is the first in alphabetical order. b. It is the one with the least number of side chains. c. It is longest chain of carbon atoms. d. It is the one that does not have a double bond.

Answer: c. It is the longest chain of carbon atoms that is most likely to be chosen as the parent compound.

4. Which side chain will get chosen first if all other things are equal?

a. Methyl b. Sec-butyl c. Pentyl d. Isopropyl

Answer: b. Iso is not considered a prefix for alphabetizing purposes; however, sec- is considered a prefix. For this reason, “butyl” will be considered to be alphabetically the first side chain chosen.

5. What is the suffix when there is a double bond and a triple bond in the parent compound?

a. Enyne b. Adiene c. Yne d. Al

Answer: a. The Enyne suffix, which is often broken up to have a number between “en” and “yne” is what a parent compound is called when it contains both a double bond and a triple bond. What this looks like is 4-octen-1-yne.

6. What is added to an organic molecule to get an alcohol?

a. CH3 b. Chlorine c. COOH d. OH

Answer: d. The OH molecule is added to an alkane to lead to an alcohol from the alkane.

7. Which alcohol has two hydroxyl side groups?

a. 2-methyl-1 pentanol b. 1,3 pentanediol c. 2-cyclopenten-1-ol d. 1-cyclohexanol

Answer: b. 1,3-pentanediol is a five-carbon pentane molecule with an OH side chain at the one and three position.

8. What is the key feature of an ether?

a. It has a COOH side chain b. It has an isopropyl side chain c. It has two side chains with an oxygen in the middle d. It has an O side chain with a double bond on the oxygen molecule

Answer: c. It has two side chains with an oxygen in the middle, such as diethyl-ether, which is a molecule that is a CH3CH2OCH2CH3 configuration (two ethyl groups attached by a single bonded oxygen molecule.

9. Which aldehyde has a ring structure associated with it?

a. Formaldehyde b. Acetaldehyde c. Benzaldehyde d. Propanal

Answer: c. Benzaldehyde has a ring structure, which has a benzene ring attached to a carbonyl group as a side chain.

10. Which ketone has two carbonyl subunits?

a. Acetone b. 2,4-Pentanedione c. 2-pentanone d. Propanone

Answer: b. Anytime there is a dione suffix, it means that there are two carbonyl subunits. If there is any question as to their location, they are numbered.