Question 1

The elements S, Te, and Se when arranged in the increasing order of the stability of their highest oxidation states, follow the order:

Accepted Answer

A)  S < Se < Te. 
B)  S < Te < Se. 
C)  Se < Te < S. 
D)  Te < S < Se. 
E)  Te < Se < S. 
A)  S < Se < Te. 
B)  S < Te < Se. 
C)  Se < Te < S. 
D)  Te < S < Se. 
E)  Te < Se < S.

Question 2

The balanced chemical equation for the reaction of aluminium with nitrogen is _____.

Accepted Answer

A) $\mathrm { Al } ( \mathrm { s } ) + \mathrm { N } _ { 2 } ( \mathrm {~g} ) \stackrel { \Delta } { \rightarrow } \mathrm { AlN } _ { 2 } ( \mathrm {~s} )$ 
B)  $2 \mathrm { Al } ( \mathrm { s } ) + \mathrm { N } _ { 2 } ( \mathrm {~g} ) \stackrel { \Delta } { \rightarrow } 2 \mathrm { AlN } ( \mathrm { s } )$ 
C)  $2 \mathrm { Al } ( \mathrm { s } ) + 2 \mathrm {~N} ( \mathrm {~g} ) \stackrel { \Delta } { \rightarrow } 2 \mathrm { AlN } ( \mathrm { s } )$ 
D)  $2 \mathrm { Al } ( \mathrm { s } ) + \mathrm { N } _ { 2 } ( \mathrm {~g} ) \stackrel { \mathrm { A } } { \rightarrow } \mathrm { Al } _ { 2 } \mathrm {~N} _ { 2 } ( \mathrm {~s} )$ 
E)  $\mathrm { Al } _ { 2 } ( \mathrm {~s} ) + \mathrm { N } _ { 2 } ( \mathrm {~g} ) \stackrel { \Delta } { \rightarrow } 2 \mathrm { AlN } ( \mathrm { s } )$ 
A) $\mathrm { Al } ( \mathrm { s } ) + \mathrm { N } _ { 2 } ( \mathrm {~g} ) \stackrel { \Delta } { \rightarrow } \mathrm { AlN } _ { 2 } ( \mathrm {~s} )$ 
B)  $2 \mathrm { Al } ( \mathrm { s } ) + \mathrm { N } _ { 2 } ( \mathrm {~g} ) \stackrel { \Delta } { \rightarrow } 2 \mathrm { AlN } ( \mathrm { s } )$ 
C)  $2 \mathrm { Al } ( \mathrm { s } ) + 2 \mathrm {~N} ( \mathrm {~g} ) \stackrel { \Delta } { \rightarrow } 2 \mathrm { AlN } ( \mathrm { s } )$ 
D)  $2 \mathrm { Al } ( \mathrm { s } ) + \mathrm { N } _ { 2 } ( \mathrm {~g} ) \stackrel { \mathrm { A } } { \rightarrow } \mathrm { Al } _ { 2 } \mathrm {~N} _ { 2 } ( \mathrm {~s} )$ 
E)  $\mathrm { Al } _ { 2 } ( \mathrm {~s} ) + \mathrm { N } _ { 2 } ( \mathrm {~g} ) \stackrel { \Delta } { \rightarrow } 2 \mathrm { AlN } ( \mathrm { s } )$

Question 3

Which of the following group 13 elements is a semimetal that is unreactive?

Accepted Answer

A)  Thallium 
B)  Boron 
C)  Aluminum 
D)  Gallium 
E)  Indium 
A)  Thallium 
B)  Boron 
C)  Aluminum 
D)  Gallium 
E)  Indium

Question 4

Iodine is the least polarizable of the halogens.

Accepted Answer

A) True 
 B)False

Question 5

Nitrogen reacts with semimetals at high temperatures to form _____, which have high melting points and are chemically inert materials.

Accepted Answer

A)  interstitial nitrides 
B)  cyanogens 
C)  ionic nitrides 
D)  hydrazines 
E)  covalent nitrides 
A)  interstitial nitrides 
B)  cyanogens 
C)  ionic nitrides 
D)  hydrazines 
E)  covalent nitrides

Question 6

The chalcogens have _____ electron configurations.

Accepted Answer

The answer of The chalcogens have _____ electron configurations....

Question 7

All elements of group 18 have closed-shell valence electron configurations.

Accepted Answer

A) True 
 B)False

Question 8

When elemental boron is heated with excess halogen, it forms _____.

Accepted Answer

The answer of When elemental boron is heated with excess...

Question 9

Elemental nitrogen readily reacts with halogens.

Accepted Answer

A) True 
 B)False

Question 10

The stability of binary hydrides increases down the group.

Accepted Answer

A) True 
 B)False

Question 11

Group 16 is the first group in the p block with no stable metallic elements.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following elements is highly toxic?

Accepted Answer

A)  Ga 
B)  B 
C)  Al 
D)  In 
E)  Tl 
A)  Ga 
B)  B 
C)  Al 
D)  In 
E)  Tl

Question 13

The stability of the highest oxidation state of the chalcogens decreases with increasing atomic number.

Accepted Answer

A) True 
 B)False

Question 14

The halogens F, Cl and Br, when arranged in the decreasing order of their oxidative strength follow the order:

Accepted Answer

A)  Cl > Br > F. 
B)  Cl > F > Br. 
C)  F > Cl > Br. 
D)  F > Br > Cl. 
E)  Br > F > Cl. 
A)  Cl > Br > F. 
B)  Cl > F > Br. 
C)  F > Cl > Br. 
D)  F > Br > Cl. 
E)  Br > F > Cl.

Question 15

Lead is the only group 14 element that is metallic in both structure and properties under all conditions.

Accepted Answer

A) True 
 B)False

Question 16

How is boron produced in large scale from borax?

Accepted Answer

Boron is produced on a large scale by re

Question 17

The oxides of elements in or near the diagonal band of semimetals are generally _____.

Accepted Answer

The answer of The oxides of elements in or near...

Question 18

What are silicates? Give examples.

Accepted Answer

Compounds with anions that contain only

Question 19

How is oxygen obtained from potassium chlorate?

Accepted Answer

Oxygen can be obtained by the

Question 20

Xenon has a high affinity for oxygen.

Accepted Answer

A) True 
 B)False

Exam 22: The P-Block Elements

The elements S, Te, and Se when arranged in the increasing order of the stability of their highest oxidation states, follow the order:

The balanced chemical equation for the reaction of aluminium with nitrogen is _____.

Which of the following group 13 elements is a semimetal that is unreactive?

Iodine is the least polarizable of the halogens.

Nitrogen reacts with semimetals at high temperatures to form _____, which have high melting points and are chemically inert materials.

The chalcogens have _____ electron configurations.

All elements of group 18 have closed-shell valence electron configurations.

When elemental boron is heated with excess halogen, it forms _____.

Elemental nitrogen readily reacts with halogens.

The stability of binary hydrides increases down the group.

Group 16 is the first group in the p block with no stable metallic elements.

Which of the following elements is highly toxic?

The stability of the highest oxidation state of the chalcogens decreases with increasing atomic number.

The halogens F, Cl and Br, when arranged in the decreasing order of their oxidative strength follow the order:

Lead is the only group 14 element that is metallic in both structure and properties under all conditions.

How is boron produced in large scale from borax?

The oxides of elements in or near the diagonal band of semimetals are generally _____.

What are silicates? Give examples.

How is oxygen obtained from potassium chlorate?

Xenon has a high affinity for oxygen.

Introduction to Chemistry

Molecules, Ions, and Chemical Formulas

Chemical Reactions

Reactions in Aqueous Solution

Energy Changes in Chemical Reactions

The Structure of Atoms

The Periodic Table and Periodic Trends

Ionic Versus Covalent Bonding

Molecular Geometry and Covalent Bonding Models

Gases

Liquids

Solids

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Acidbase Equilibriums

Solubility and Complexation Equilibriums

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Periodic Trends and the S-Block Elements

The D-Block Elements

Organic Compounds

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