Naming branch-chained alkanes

What is the term used for the groups of atoms branching off the main carbon chain in organic molecules?

• Alkyl groups

• Aromatic rings

• Hydroxyl groups

• Carboxyl groups

When numbering the carbon atoms in a branched alkane, what is the main goal?

• To alternate the numbering between high and low

• To give the lowest possible numbers to the branches

• To give the highest possible numbers to the branches

• To number them randomly for simplicity

In the naming of branched alkanes, which prefixes are not considered when alphabetizing the side chains?

• Iso, neo, cyclo

• Methyl, ethyl, propyl

• Di, tri, tetra

• Sec, tert

What is the correct name for a molecule with a methyl group on the third carbon of a heptane chain?

• 3-ethylheptane

• 3-methylheptane

• 3-dimethylheptane

• 1-methylheptane

How is a molecule with two methyl groups on the fourth and fifth carbon, and an ethyl group on the third carbon of an octane chain named?

• 3-ethyl-4,5-dimethyl octane

• 3,4,5-trimethyl octane

• 3-methyl-4,5-diethyl octane

• 4,5-dimethyl-3-propyl octane