Question 1

Which one of the following is sodium thiosulfate?

Accepted Answer

A) Na2SO4 
B) Na2SO3 
C) Na2S2O3 
D) Na2S4O6 
E) Na2S

Question 2

Write the correctly balanced equation for the reaction between elemental fluorine and sodium iodide.

Accepted Answer

The answer of Write the correctly balanced equation for the...

Question 3

Boric acid condenses to form tetraboric acid according to the equation ________.

Accepted Answer

A) 4H3BO3 (s)→ 2H2B2O7 (s)+ 3H2O (g) 
B) 2H3BO3 (s)→ HB2O2 (s)+ 4H2O (g) 
C) 4H3BO3 (s)→ HB4O8 (s)+ 4H2O (g) 
D) 2H3BO3 (s)→ H2B4O7 (s)+ 3H2O (g) 
E) 4H3BO3 (s)→ H2B4O7 (s)+ 5H2O (g)

Question 4

Of the nonradioactive halogens,which is the largest?

Accepted Answer

The answer of Of the nonradioactive halogens,which is the largest?...

Question 5

The least electronegative of the elements below is ________.

Accepted Answer

A) Se 
B) S 
C) F 
D) Cl 
E) Br

Question 6

Which of the following would produce a basic solution?

Accepted Answer

A) Na2O and CaO 
B) CO and CO2 
C) CaH2 only 
D) Na2O, CaO, and CaH2 
E) CO, CO2, and CaH2

Question 7

Explain why silicon does not form any allotropes with structures analogous to that of graphite or buckminsterfullerenes,even though it is in the same group as carbon.

Accepted Answer

The answer of Explain why silicon does not form any...

Question 8

The oxidation number of xenon in XeF4 is ________.

Accepted Answer

A) +4 
B) +3 
C) +5 
D) +1 
E) -6

Question 9

The reduction of metal oxides uses carbon monoxide.

Accepted Answer

A) True 
 B)False

Question 10

Glass is ________ whereas quartz is ________.

Accepted Answer

A) hard, soft 
B) crystalline, amorphous 
C) amorphous, crystalline 
D) pure Si  , a mixture of Si  and carbonates 
E) breakable, not breakable

Question 11

Which one of the following compounds is peroxide?

Accepted Answer

A) Li2O2 
B) Li2O 
C) LiO2 
D) both Li2O2 and LiO2 
E)   O

Question 12

The oxidation number of B in B2O3 is ________.

Accepted Answer

A) +3 
B) +2 
C) +1 
D) +4 
E) +5

Question 13

Diborane is ________.

Accepted Answer

A) B10H14 
B) B2O3 
C) BH3 
D) B2H6 
E) H3BO3

Question 14

SiO44- is the ________ ion.

Accepted Answer

A) orthosilicate ion 
B) silicide ion 
C) thiosilicate ion 
D) silicon tetroxide ion 
E) siliconate ion

Exam 22: Chemistry of the Nonmetals