1)

The number of isomers of pentane is

A)

2

B)

3

C)

4

D)

5

E)

1

2)

Addition reactions are undergone by

A)

saturated hydrocarbons (alkanes)

B)

only alkenes

C)

only alkynes

D)

both alkenes and alkynes

3)

In diamond, each carbon atom is bonded to four other carbon atoms to form

A)

a hexagonal array

B)

a rigid three-dimensional structure

C)

a structure in the shape of a football

D)

a structure of a ring

4)

A soap molecule has a

A)

hydrophobic head and hydrophobic tail

B)

hydrophobic head and hydrophilic tail

C)

hydrophilic head and hydrophilic tail

D)

hydrophilic head and hydrophobic tail