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Polar Nonpolar Soluble

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

In order to help us make a little more sense of the chemical world, humans naturally tend to ___

a)

jumble and scatter

b)

classify and categorize

c)

shimmy and shake

d)

combine and conquer

2.

Water, H2O, is classified as what type of molecule?

a)

a polar molecule

b)

a nonpolar molecule

c)

a coordinate covalent compound

d)

an ionic compound

3.

The various chemicals that make up butter are generally ___

a)

polar

b)

nonpolar

c)

soluble in water

d)

ionic compounds

4.

A molecule made up entirely of the same element will have an electron distribution that is ___

a)

completely symmetrical

b)

asymmetrical

c)

decreasing from left to right

d)

polar

5.

What is the measure of the tendency of an atom to attract bonding electrons called?

a)

ionization energy

b)

electron charisma

c)

dipole momentum

d)

electronegativity

6.

Electronegativity increases from left to right on the periodic table because there are ___

a)

fewer protons in the atoms

b)

more protons in the atoms

c)

fewer electron shells

d)

more electron shells

7.

Electronegativity decreases as you move from top to bottom on the periodic table because ___

a)

the increased electrons shield each other from the protons

b)

there are more protons in the atoms

c)

there are fewer electron shells

d)

of the asymmetrical electron distribution

8.

Which elements are the "superstars of electronegativity-fame"?

a)

iron, nickel, copper, silver and gold

b)

oxygen, nitrogen, fluorine, chlorine, and bromine

c)

boron, carbon, oxygen, nitrogen, and fluorine

d)

lithium, sodium, potassium, rubidium, and cesium

9.

For polarity to occur in a bond, you need two elements with a difference in their electronegativities of ___

a)

0.5 or less

b)

between 0.5 and 1.6

c)

less than 1.6

d)

greater than 1.6

10.

CO2 has charge asymmetry, but is not a polar molecule because it's ___

a)

linear

b)

bent

c)

tetrahedral

d)

trigonal pyramidal

11.

Methane, CH4, has polar bonds but is not a polar molecule because ___

a)

of geometrical asymmetry

b)

of geometrical symmetry

c)

it's linear

d)

of no electronegativity differences

12.

The separation of the charge around a molecule into a more positive area and a more negative area creates ___

a)

a polar vortex

b)

a dipole moment

c)

a magnetic monopole

d)

a magnetic dipole

13.

The dipole moment is represented by an arrow with a plus sign at the tail pointing toward ___

a)

a fluorine atom

b)

the negative side of the molecule

c)

magnetic north

d)

the least electronegative element

14.

A little lowercase delta plus (δ+) or delta minus (δ–) by the individual atoms signify ___

a)

partial charges

b)

the magnetic poles

c)

a difference in electronegativities

d)

nonpolar molecules

15.

Liquids made up of polar molecules are really good at dissolving ___

a)

metallic solids

b)

lipids and fats

c)

molecular solids

d)

solids composed of polar or ionic compounds

16.

Polarity taken to the extreme, where the electrons have completely transferred, creates ___

a)

radioactive isotopes

b)

an ultrapolar molecule

c)

two charged ions

d)

a molecular compound

17.

The oxygen sides of water are always doing their best to orient themselves toward ___

a)

magnetic north

b)

the hydrogen sides of other molecules

c)

negative ions

d)

the surface of a liquid

18.

The attractive intermolecular forces that pull molecules of a liquid together are called ___

a)

adhesive forces

b)

cohesive forces

c)

covalent bonds

d)

polar covalent bonds

19.

Water doesn't mix with oil because, rather than the water disliking the oil, it actually ___

a)

absorbs the oil

b)

likes it a bit too much

c)

likes itself much more

d)

chemically reacts with the oil

20.

What are the loose, somewhat fleeting, intermolecular bonds between water molecules called?

a)

hydrogen bonds

b)

oxygen bonds

c)

water bonds

d)

polar covalent bonds

21.

Due to the arrangement of hydrogen bonds, a volume of ice is how much larger than the same mass of water?

a)

about 5% larger

b)

about 10% larger

c)

about 15% larger

d)

more than 20% larger

22.

When ice melts, what percent of O's and H's are still engaged in hydrogen bonding?

a)

about 50%

b)

about 65%

c)

about 80%

d)

about 95%

23.

At what temperature does water have its highest density?

a)

-4 °C

b)

0 °C

c)

4 °C

d)

8 °C

24.

There are lots of different molecules, like the surfactants in soap, that have both ___

a)

polar and nonpolar areas

b)

covalent and ionic bonds

c)

cohesive and adhesive forces

d)

hydrogen and oxygen bonds

25.

The fatty acids that make up your cell membranes have ___

a)

polar heads and tails

b)

nonpolar heads and tails

c)

polar heads but nonpolar tails

d)

nonpolar heads but polar tails