Hydrocarbons that contain a delocalized ring of π-bonds such as benzene ring are called ___________ hydrocarbons.

• aromatic

• aliphatic

• organic

• cyclo

Aliphatic hydrocarbons consist only single bonds, and so are called ____________ hydrocarbons.

• unsaturated

• saturated

• aromatic

• chain

____________ groups are atoms, groups of atoms or bond that determine the characteristic of an organic compound.

• Aliphatic

• Aromatic

• Functional

• Hydrocarbon

How many carbon atoms are in propane?

• 1

• 2

• 3

• 4

__________ series is a series of compounds with same functional group differing from the successive member by CH₂.

• Heterologous

• Homologous

• Hydrocarbon

• Group

In organic chemistry, molecular and ____________ formulas were used to express what a particular molecule consists of.

• structural

• organic

• chemical

• physical

__________ structural formula are written without showing all the individual bonds. In a condensed structure, each central atom is shown together with the atoms that are bonded to it

• Molecular

• Condensed

• Expanded

• Skeletal

In order to show how the atoms are connected, structural formulas such as __________ , __________ and _________ structures are used.

• expanded, condensed, skeletal

• expanded, condensed, molecular

• hydrocarbon, expanded, skeletal

• molecular, condensed, skeletal

Two main types of isomers are the __________ (structural) isomers and ____________.

• stereoisomers, optical

• constitutional, optical

• constitutional, stereoisomers

• enantiomers, stereoisomers

Isomers are molecules that have the _________molecular formula (contain the same number of atoms) but ______ structurally (having different arrangement of the atoms in space).

• differ, differ

• same, differ

• same, same

• differ, same