Review Test 1

Which of the following ionizes completely in solution and is considered to be a strong acid?

HCl

Which of the following statements is completely correct?

NH3 is a weak base (alkali), and HCl is a strong acid

Which is the best description of a carbonyl group?

a carbon atom joined to an oxygen by a double covalent bond

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by

polar covalent bonds

Testosterone and estradiol are

steroids

Temperature usually increases when water condenses. Which behavior of water is most directly responsible for this phenomenon?

the release of heat by the formation of hydrogen bonds

Organic chemistry is currently defined as

the study of carbon compounds.

A carbon skeleton is covalently bonded to both an amino group and a carboxyl group. When placed in water it

would function as both an acid and a base

What is the pH of a solution with a hydrogen ion [H+] concentration of 10-8 M?

pH = 8

he molecular mass of glucose is 180 g. Which of the following procedures should you carry out to make a 1 M solution of glucose?

Dissolve 180 g of glucose in water, and then add more water until the total volume of the solution is 1 L.

14) Why are hydrocarbons insoluble in water?

The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages

Which of the following statements is true about buffer solutions?

They maintain a relatively constant pH when either acids or bases are added to them

Which of the following statements best describes the carbon atoms present in all organic molecules?

They were incorporated into organic molecules by plants They were processed into sugars through photosynthesis They are ultimately derived from carbon dioxide Answer A,B, and C

Which of the following contains nitrogen in addition to carbon, oxygen, and hydrogen?

an amino acid such as glycine

Glucose and frucose differ in the

arrangement of carbon, hydrogen, and oxygen atoms.

12) A carbon atom is most likely to form what kind of bond(s) with other atoms?

covalent

Which of the following solutions has the greatest concentration of hydrogen ions [H+]?

gastric juice at pH 2

What gives rise to the cohesiveness of water molecules?

hydrogen bonds

Why does ice float in liquid water?

hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water.

Hydrophobic substances such as vegetable oil

nonpolar substances that repel water molecules