Chapter 24 Test

Question 1

Nonmetals are which of the following:
I. electropositive
II. insulating
III. required to have only one oxidation state
IV. represented in covalent compounds

Answer 1

II and IV only

Question 2

Which of the following is not a characteristic of a nonmetal?

Answer 2

Have completely occupied p orbitals, and thus are unable to form double and triple bonds in compounds

Question 3

All of the following are isotopes of hydrogen except:

Answer 3

unerium

Question 4

By which of the following techniques could water containing regular hydrogen be separated from water containing deuterium?
I. 	mass spectrometry
II. 	freezing point depression
III. 	fractional distillation
IV. 	X-ray crystallography

Answer 4

I and III only

Question 5

All of the following are classes of binary hydrides except:

Answer 5

covalent hydrides

Question 6

Which of these elements is not considered a metalloid?

Answer 6

Aluminum

Question 7

Diamond, graphite and buckminsterfullerene are all allotropes of carbon. How do they differ from each other?

Answer 7

These allotropes each have differing connectivities that make their structures distinct.

Question 8

Through what mechanism does carbon monoxide act as a poison?

Answer 8

It binds preferentially to hemoglobin. The cells become depleted of oxygen and death occurs.

Question 9

Coke, which is used in the purification of metal from metal oxides, is pure carbon. How does it differ from graphite, which is also pure carbon?

Answer 9

Coke is an amorphous solid, graphite is a crystalline solid.

Question 10

Which of the following reactions is not a step in the purification of silicon for manufacture of computer chip semiconductor material?

Answer 10

SiO2(s) + 4HF(l) —> SiF4(g) + 2H2O(l)

Question 11

In which of the following can silicon carbide be found?

Answer 11

Sandpaper

Question 12

Which of the following is not a step in the Ostwald process?

Answer 12

N2(g) + O2(g) –> 2NO(g)

Question 13

What are the products of the commercially important decomposition of ammonium nitrate when heated?
NH4NO3(g) ——-> ? + ?

Answer 13

N2O(g) + 2H2O(g)

Question 14

Which of the following is an allotrope of phosphorus having acute bond angles, and an extreme volatility in air?

Answer 14

white phosphorus

Question 15

Adenosine triphosphate (ATP) is referred to as the “energy currency” of the cell. What aspect of the molecule endows it with this characteristic?

Answer 15

The phosphate bonds are high energy. When the bond is cleaved, it provides usable energy to other chemical reactions in the cell.

Question 16

Which of the following oxides would form an acidic solution in water?

Answer 16

CO2

Question 17

Which of the following oxides is likely to be an amphoteric oxide?

Answer 17

Al2O3

Question 18

Which of the following is not a form of naturally occurring sulfur?

Answer 18

S2

Question 19

Which of the following are examples of the disproportionation of hydrogen peroxide?

Answer 19

I and II only

Question 20

Which of the following is not used to as an additive to help identify a dangerous gas?

Answer 20

NH2CH(CH2SH)COOH

Question 21

Which chemical is correctly matched with the process that uses it?

Answer 21

chlorine dioxide : bleaching flour

Question 22

Which of the following does not involve fluorine?

Answer 22

bleached flour

Question 23

The most common method of forming hypohalous acids is through

Answer 23

reaction with water

Question 24

Which of the following noble gases has the lowest ionization energy?

Answer 24

xenon

Question 25

The only radioactive noble gas is _______ .

Answer 25

Radon