Water The Universal Solvent Quiz Chapter 7

What is the chemical formula for water?

• HO

• H2O

• H2O2

• H3O

What type of bonds are formed within a water molecule?

• Intermolecular

• Hydrogen

• Nonpolar covalent

• Polar covalent

In a hydrogen bond, the _____.

• hydrogen of one atom is attracted to the oxygen of another

• hydrogen of one atom is attracted to the hydrogen of another

• oxygen end of the molecule is slightly positive

• hydrogen end of the molecule is slightly negative

Which of the following is not a property of water?

• It is an excellent solvent

• It contains weak hydrogen bonds

• It is a nonpolar molecule

• It has a greater surface tension than most compounds.

In which state is water most dense?

• Gas

• Liquid

• Solid

• It is equally dense in all states.

The boiling point of water at sea level is ____.

• A. 100°F

• B. 100°C

• C. 32°F

• D. 32°C

Impurities in water ____.

• A. are more likely in cold than hot water

• B. can change the physical and chemical characteristics of water

• C. do not affect the way water reacts in mixtures

• D. are only a concern to the beverage industry

Water makes a good medium for cooking food because ____.

• A. most foods dissolve in it

• B. its temperature will steadily climb as cooking progresses

• C. heat is transferred throughout by conduction and convection

• D. its polarity creates increased surface tension

An advantage of cooking in steam is ____.

• A. it is faster than boiling when pressure is added

• B. foods are more flavorful

• C. foods are more nutritious

• D. All of the above.

Cooled boiled water has a flat taste because ____.

• A. boiled water contains more impurities

• B. cooking destroys bacteria

• C. there is a lower dissolved oxygen level

• D. All of the above.