Question 1

What are the products of the reaction of potassium hydride and water? KH(s)+ H2O(l)→

Accepted Answer

A) K(s)+ H2(g)+ OH-(aq) 
B) K(s)+ H2(g)+ O2(g) 
C) KOH(s)+ O2(g) 
D) K+(aq)+ H2(g)+ O2(g) 
E) K+(aq)+ H2(g)+ OH-(aq) 
A) K(s)+ H2(g)+ OH-(aq) 
B) K(s)+ H2(g)+ O2(g) 
C) KOH(s)+ O2(g) 
D) K+(aq)+ H2(g)+ O2(g) 
E) K+(aq)+ H2(g)+ OH-(aq)

Question 2

Consider the oxides XO2,where X is a main group element.Identify X in each of the following cases:
a.XO2 is a natural component of the atmosphere,implicated in global warming.
b.XO2 is a toxic,brown gas and a component of photochemical smog.
c.XO2 is a colorless,toxic gas,implicated in acid rain.

Accepted Answer

Question 3

What are the products of the reaction of strontium hydride and water? SrH2(s)+ H2O(l)→

Accepted Answer

A) Sr2+(aq)+ H2(g)+ O2(g) 
B) Sr2+(aq)+ H2(g)+ OH-(aq) 
C) Sr(s)+ H2(g)+ OH-(aq) 
D) Sr(s)+ H3O+(aq) 
E) Sr2+(aq)+ H-(aq) 
A) Sr2+(aq)+ H2(g)+ O2(g) 
B) Sr2+(aq)+ H2(g)+ OH-(aq) 
C) Sr(s)+ H2(g)+ OH-(aq) 
D) Sr(s)+ H3O+(aq) 
E) Sr2+(aq)+ H-(aq)

Question 4

Which,if any,of the following generalized formulas does not exist for interhalogen compounds? (X and Y represent different halogens.)

Accepted Answer

A) XY 
B) XY2 
C) XY3 
D) XY5 
E) All may represent stable interhalogen compounds. 
A) XY 
B) XY2 
C) XY3 
D) XY5 
E) All may represent stable interhalogen compounds.

Question 5

How many lone electron pairs are in the N2 molecule?

Accepted Answer

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

Question 6

Below is a representation of a sample of gas with molecules having the formula XO2.Which element could NOT be represented by X?

Accepted Answer

A) N 
B) S 
C) C 
D) O 
E) Cl 
A) N 
B) S 
C) C 
D) O 
E) Cl

Question 7

__________________ is the addition of molecular hydrogen to compounds containing multiple bonds (double or triple).

Accepted Answer

The answer of __________________ is the addition of molecular hydrogen...

Question 8

Which one of these species exists as a diatomic element at room temperature?

Accepted Answer

A) Na 
B) N 
C) B 
D) Ar 
E) P 
A) Na 
B) N 
C) B 
D) Ar 
E) P

Question 9

What has metal and nonmetal characteristics?

Accepted Answer

The answer of What has metal and nonmetal characteristics?...

Question 10

Which best represents the allotrope(s)of oxygen?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 11

Which of these compounds does not follow the octet rule?

Accepted Answer

A) CO 
B) CO2 
C) NF3 
D) NO 
E) CF4 
A) CO 
B) CO2 
C) NF3 
D) NO 
E) CF4

Question 12

Which of the following is not a product of the reaction of zinc metal with nitric acid?

Accepted Answer

A) NH4+ 
B) H2O 
C) H2 
D) Zn2+ 
E) All of the species are products. 
A) NH4+ 
B) H2O 
C) H2 
D) Zn2+ 
E) All of the species are products.

Question 13

In their elemental forms,the halogens are

Accepted Answer

A) strong oxidizing agents. 
B) strong reducing agents. 
C) strong acids. 
D) strong bases. 
E) amphoteric. 
A) strong oxidizing agents. 
B) strong reducing agents. 
C) strong acids. 
D) strong bases. 
E) amphoteric.

Question 14

Nonmetals are more electropositive than metals.

Accepted Answer

A) True 
 B)False

Question 15

The chemical that ranks first in production among all industrial chemicals is

Accepted Answer

A) NH3,ammonia. 
B) H3PO4,phosphoric acid. 
C) NaOH,sodium hydroxide. 
D) Na2CO3,sodium carbonate. 
E) H2SO4,sulfuric acid. 
A) NH3,ammonia. 
B) H3PO4,phosphoric acid. 
C) NaOH,sodium hydroxide. 
D) Na2CO3,sodium carbonate. 
E) H2SO4,sulfuric acid.

Question 16

Hydrogen forms metallic (interstitial)hydrides with the d and f transition elements.Which of the following statements is correct?

Accepted Answer

A) These substances have distinct stoichiometric formulas like ionic hydrides. 
B) Hydrogen forms bonds with the metals by donating its electron to the valence band of the metal. 
C) Hydrogen molecules and atoms occupy holes within the crystal structure of the metal. 
D) These substances are poor catalysts. 
E) These hydrides are stabilized by hydrogen bonding forces. 
A) These substances have distinct stoichiometric formulas like ionic hydrides. 
B) Hydrogen forms bonds with the metals by donating its electron to the valence band of the metal. 
C) Hydrogen molecules and atoms occupy holes within the crystal structure of the metal. 
D) These substances are poor catalysts. 
E) These hydrides are stabilized by hydrogen bonding forces.

Question 17

Which oxide is an amphoteric oxide?

Accepted Answer

A) Na2O 
B) Al2O3 
C) BaO 
D) SiO2 
E) More that one of these oxides are amphoteric. 
A) Na2O 
B) Al2O3 
C) BaO 
D) SiO2 
E) More that one of these oxides are amphoteric.

Question 18

Which of the following is a commercial application of phosphate compounds?

Accepted Answer

A) Detergents 
B) Toothpaste 
C) Fertilizers 
D) Flame retardants 
E) All of the answers are correct. 
A) Detergents 
B) Toothpaste 
C) Fertilizers 
D) Flame retardants 
E) All of the answers are correct.

Question 19

Which of these has a nonpolar covalent bond (i.e.,pure covalent)?

Accepted Answer

A) Se-I 
B) Na-Br 
C) H-F 
D) Cl-Cl 
E) H-Cl 
A) Se-I 
B) Na-Br 
C) H-F 
D) Cl-Cl 
E) H-Cl

Question 20

Arsenic,As,is

Accepted Answer

A) an essential element in the human body. 
B) toxic because it results in an increase in the production of ATP. 
C) toxic because it binds to the sulfhydryl group in proteins and enzymes. 
D) used in high concentrations in ancient cosmetics. 
E) None of these choices is correct. 
A) an essential element in the human body. 
B) toxic because it results in an increase in the production of ATP. 
C) toxic because it binds to the sulfhydryl group in proteins and enzymes. 
D) used in high concentrations in ancient cosmetics. 
E) None of these choices is correct.

Exam 24: Nonmetallic Elements and Their Compounds

What are the products of the reaction of potassium hydride and water? KH(s)+ H2O(l)→

Consider the oxides XO2,where X is a main group element.Identify X in each of the following cases: a.XO2 is a natural component of the atmosphere,implicated in global warming. b.XO2 is a toxic,brown gas and a component of photochemical smog. c.XO2 is a colorless,toxic gas,implicated in acid rain.

What are the products of the reaction of strontium hydride and water? SrH2(s)+ H2O(l)→

Which,if any,of the following generalized formulas does not exist for interhalogen compounds? (X and Y represent different halogens.)

How many lone electron pairs are in the N2 molecule?

Below is a representation of a sample of gas with molecules having the formula XO2.Which element could NOT be represented by X?

__________________ is the addition of molecular hydrogen to compounds containing multiple bonds (double or triple).

Which one of these species exists as a diatomic element at room temperature?

What has metal and nonmetal characteristics?

Which best represents the allotrope(s)of oxygen?

Which of these compounds does not follow the octet rule?

Which of the following is not a product of the reaction of zinc metal with nitric acid?

In their elemental forms,the halogens are

Nonmetals are more electropositive than metals.

The chemical that ranks first in production among all industrial chemicals is

Hydrogen forms metallic (interstitial)hydrides with the d and f transition elements.Which of the following statements is correct?

Which oxide is an amphoteric oxide?

Which of the following is a commercial application of phosphate compounds?

Which of these has a nonpolar covalent bond (i.e.,pure covalent)?

Arsenic,As,is

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Filters

What are the products of the reaction of potassium hydride and water? KH(s)+ H₂O(l)→

What are the products of the reaction of strontium hydride and water? SrH₂(s)+ H₂O(l)→

How many lone electron pairs are in the N₂ molecule?

Below is a representation of a sample of gas with molecules having the formula XO₂.Which element could NOT be represented by X?