# Frank solutions for ICSE Class 10 Chemistry Part 2 chapter 2 - Chemical Bonding [Latest edition]

## Chapter 2: Chemical Bonding

ExerciseExercise Exercise 2
Exercise, Exercise , Exercise 2 [Pages 35 - 42]

### Frank solutions for ICSE Class 10 Chemistry Part 2 Chapter 2 Chemical Bonding Exercise, Exercise , Exercise 2 [Pages 35 - 42]

Exercise | Q 1 | Page 42

What is meant by the term chemical bond and chemical bonding?

Exercise | Q 2 | Page 42

Why do atoms combine?

Exercise | Q 3.1 | Page 42

Define
an electrovalent compound

Exercise | Q 3.2 | Page 42

Define
a covalent compound.

Exercise | Q 4 | Page 42

What are the conditions for the formation of an electrovalent bond?

Exercise | Q 5 | Page 42

State differences between the properties of ionic compounds and covalent compounds.

Exercise | Q 6 | Page 42

Taking hydrogen chloride and methane as examples, distinguish between a polar covalent bond and a non polar covalent bond.

Exercise | Q 7 | Page 35

How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?

How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?

Exercise 2 | Q 7 | Page 35

How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?

How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?

Exercise [Page 43]

### Frank solutions for ICSE Class 10 Chemistry Part 2 Chapter 2 Chemical Bonding Exercise [Page 43]

Exercise | Q 1.1 | Page 43

Draw electron dot structure of the following:
MgCl2

Exercise | Q 1.2 | Page 43

Draw electron dot structures of the following
CaO

Exercise | Q 1.3 | Page 43

Draw electron dot structure of the following:
NaCl

Exercise | Q 2.1 | Page 43

Draw the orbit structure of the following:
N2

Exercise | Q 2.2 | Page 43

Draw the orbit structure of the following:
Cl2

Exercise | Q 2.3 | Page 43

Draw the orbit structure of the following:
H2

Exercise | Q 3.1 | Page 43

Explain the following briefly:
Sodium chloride dissolves in water but carbon tetra chloride is insoluble in water.

Exercise | Q 3.2 | Page 43

Explain the following briefly:
Helium does not form He2  molecule

Exercise | Q 3.3 | Page 43

Explain the following briefly.
Pure water does not conduct electricity, but on adding sodium chloride to it, it starts conducting electricity.

Exercise | Q 3.4 | Page 43

Explain the following briefly:
Cl2 is a non polar molecule, while HCl is a polar molecule.

Exercise | Q 3.5 | Page 43

Explain the following briefly:
Metals are electropositive.

Exercise | Q 4.1 | Page 43

What type of bond is formed between two atoms, when the electronegative difference between them is High ?

Exercise | Q 4.2 | Page 43

What type of bond is formed between two atoms, when the electronegative difference between them is low ?

Exercise | Q 4.2 | Page 43

Separate the following compounds into three categories - ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.

Exercise | Q 4.3 | Page 43

What type of bond is formed between two atoms, when the electronegative difference between them is zero?

Exercise | Q 5 | Page 43

Elements X and Y have the following configurations:
X (2, 8, 7),    Y (2, 8, 8, 2)
(a) What will be the nature of bond between X and Y?
(b) Draw the diagram to show the bond formation between X and Y?
(c) Sate three main properties of this compound.

Exercise | Q 6.1 | Page 43

Give examples for the following:
Ionic chlorides of two different divalent metals.

Exercise | Q 6.2 | Page 43

Give examples for the following:
Two solid covalent compounds.

Exercise | Q 6.3 | Page 43

Give examples for the following:
Two liquid non polar compounds.

Exercise | Q 6.4 | Page 43

Give examples for the following:
Two gaseous polar compounds.

Exercise | Q 6.5 | Page 43

Give examples for the following:
Two gaseous non polar compounds.

Exercise | Q 7 | Page 43
What are the conditions necessary for the formation of covalent molecule? Give their properties.
Exercise | Q 8 | Page 43

Define a coordinate bond and give the conditions for its formation.

Exercise | Q 9 | Page 43

What do you understand by lone pair and shared pair?

Exercise | Q 10.1 | Page 43

Explain the structure of Hydronium ion.

Exercise | Q 10.2 | Page 43

Explain the structure of Ammonium ion.

Exercise | Q 11.1 | Page 43

Explain the following:
Covalent compounds are generally gases or liquids or soft solids.

Exercise | Q 11.2 | Page 43

Explain the following:
Covalent compounds have low melting and boiling point.

Exercise | Q 11.3 | Page 43

Explain the following:
Non-polar covalent compounds are insoluble in water.

Exercise | Q 11.4 | Page 43

Explain the following:
Polar covalent compounds are good conductors of electricity.

Exercise | Q 12.1 | Page 43

Fill in the blanks.
The electrovalent bond or ionic bond is called as _____ bond

Exercise | Q 12.2 | Page 43

Fill in the blanks
When ionic compound are dissolved in water their constituent ions get separated, this phenomenon is called _______ or ________

Exercise | Q 12.3 | Page 43

Fill in the blank
__________ compounds generally are soluble in water and insoluble in organic solvents

Exercise | Q 12.4 | Page 43

Fill in the blank
Coordinate bond is also called __________bond.

Exercise | Q 12.5 | Page 43

Fill in the blanks
A coordinate bond is represented by an arrow pointing from ________ to__________ atom.

Exercise | Q 12.6 | Page 43

Fill in the blank.
___________ single covalent bonds are formed between the carbon and chlorine atoms.

Exercise [Page 44]

### Frank solutions for ICSE Class 10 Chemistry Part 2 Chapter 2 Chemical Bonding Exercise [Page 44]

Exercise | Q 1.1 | Page 44

Choose the correct answer from the options given below
Condition favorable for formation of a electrovalent bond is

• High ionization energy

• Low electron affinity

• Less electronegativity difference

• High lattice energy

Exercise | Q 1.2 | Page 44

Choose the correct answer from the options given below
Which one is not the characteristic of the electrovalent or ionic compound

• They are generally solid at ordinary compounds

• Low boiling and low melting points

• Good conductors of electricity in the molten state and aqueous solution

• Generally soluble in water

Exercise | Q 1.3 | Page 44

Choose the correct answer from the options given below
Condition favorable for formation of a covalent bond is

• Equal electro negativities of combining atoms

• Difference in electron affinities between combining atoms

• Atoms should have low ionistation energy

• Low nuclear charge and large internuclear distance

Exercise | Q 1.4 | Page 44

Choose the correct answer from the options given below
Which one is coordinate molecule?

• H2O

• CH4

• N2

• $\ce{NH+4}$

Exercise | Q 1.5 | Page 44

Choose the correct answer from the options given below
Which one is not example of polar covalent compound?

• H2O

• Methane

• Hydrogen fluoride

• Ammonia

Exercise | Q 2 | Page 44

Copy and complete the following table

 Sodium Phosphorous Formula of chloride Physical state of chloride at room temperature(i.e., Solid,Liquid or gas) Nature of bonding in chloride
Exercise [Page 45]

### Frank solutions for ICSE Class 10 Chemistry Part 2 Chapter 2 Chemical Bonding Exercise [Page 45]

Exercise | Q 1 | Page 45

Element X is a metal with a valency 2. Element Y is a non metal with a valency 3.
(a) Write equations to show how X and Y form ions.
(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.

Exercise | Q 2.1 | Page 45

(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
The type of bonding in X will be

• Ionic

• Electrovalent

• Covalent

• Molecular

Exercise | Q 2.1 | Page 45

(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
X is likely to have a :

• Low melting point and high boiling point

• High melting point and low boiling point

• Low  melting point and low boiling point

• High melting point and high boiling point

Exercise | Q 2.1 | Page 45

(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
In the liquid state, X will

• become ionic

• be an electrolyte

• Conduct electricity

• not conduct electricity

Exercise | Q 2.2 | Page 45

Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.

Exercise | Q 2.2 | Page 45

Explain, why carbon tetra chloride does not dissolve in water?

Exercise | Q 2.2 | Page 45

Elements Q and S react together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in?

Exercise | Q 2.2 | Page 45

Exercise | Q 3.1 | Page 45

What is a lone pair of electrons?

Exercise | Q 3.2 | Page 45

Draw an electron dot diagram of a hydronium ion and label the lone pair of electrons.

Exercise | Q 3.3 | Page 45

Name a neutral covalent molecule which contains one lone pair of electrons.

Exercise | Q 4.1 | Page 45

Choose the correct answer from the choices (a), (b), (c) and (d)
The property which is characteristic of an electrovalent compound is that

• It is easily vaporized

• It has high melting point

• It is a weak electrolyte

• It often exists as a liquid

Exercise | Q 4.2 | Page 45

Choose the correct answer from the choices (a), (b), (c) and (d)
When a metal atom becomes an ion

• It loses electrons and is oxidized

• It gains electrons and is reduced

• It gains electrons and is oxidized

• It loses electrons and is reduced

Exercise [Page 46]

### Frank solutions for ICSE Class 10 Chemistry Part 2 Chapter 2 Chemical Bonding Exercise [Page 46]

Exercise | Q 1.1 | Page 46

Name the charged particles which attract one another to form electrovalent compound?

Exercise | Q 1.2 | Page 46

In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?

Exercise | Q 1.3 | Page 46

The electronic configuration of N2 is 2, 5. How many electrons in the outer shell of a N atom are not involved in the formation of a nitrogen molecule?

Exercise | Q 1.4 | Page 46

In the formation of magnesium chloride (by direct combination between magnesium and chlorine) name the substance that is oxidized and the substance that is reduced.

Exercise | Q 2 | Page 46

Which of the following is not a common characteristic of an electrovalent compound?

• High melting point.

• Conducts electricity when molten.

• Consists of oppositely charged ions.

• Ionises when dissolved in water.

Exercise | Q 3.1 | Page 46

Fill in the blank with correct word from the bracket.
Generally ionic compounds exist in ______ (solid, liquid, gas) state.

Exercise | Q 3.2 | Page 46

Fill in the blank with correct word from the bracket.
Melting and boiling points of covalent compounds are generally ______ (low, high).

Exercise | Q 4.1 | Page 46

What are the terms defined in below
A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.

Exercise | Q 4.2 | Page 46

What are the terms defined in below?
A bond formed by a shared pair of electrons with both electrons coming from the same atom.

Exercise | Q 5 | Page 46

Match the column A with Column B.

 Column A Column B (i) Sodium chloride (ii) Ammonium ion (iii) Carbon tetrachloride Covalent bond Ionic bond Covalent and coordinate bond
Exercise | Q 6 | Page 46

Give reason as to why hydrogen chloride can be termed as a polar covalent compound.

Exercise | Q 7 | Page 46

By drawing an electron dot diagram, show the lone pair effect leading to the formation of ammonium ion from ammonia gas and hydrogen ion.

Exercise [Page 47]

### Frank solutions for ICSE Class 10 Chemistry Part 2 Chapter 2 Chemical Bonding Exercise [Page 47]

Exercise | Q 1 | Page 47

Compare the compounds carbon tetrachloride and sodium chloride with regard to solubility in water and electrical conductivity.

Exercise | Q 2 | Page 47

Give suitable chemical terms for the bond formed by a shared pair of electrons with both electrons coming from the same atom.

Exercise | Q 3 | Page 47

Which of the following is not a typical property of an ionic compound?

• High melting point

• Conducts electricity in the molten and the aqueous solution state.

• Insoluble in water

• Exist as oppositely charged ions even in the solid state

Exercise | Q 4 | Page 47

Among the following compounds identify the compound that has all three bonds (ionic, covalent and coordinate bond).

• Ammonia

• Ammonium chloride

• Sodium hydroxide

• Calcium chloride

Exercise | Q 5 | Page 47

The molecule which contains a triple covalent bond is

• ammonia

• methane

• water

• nitrogen

Exercise | Q 6 | Page 47

A Compound 'X' consists of only molecules. Hence 'X' will have

• a Crystalline hard structure

• A low melting point  and low boiling point

• An ionic bond

• A strong force of attraction between its molecules

Exercise | Q 8 | Page 47

Bonding in this molecule can be understood to involve coordinate bonding.

• Carbon tetrachloride

• Hydrogen

• Hydrogen chloride

• Ammonium chloride

Exercise | Q 10 | Page 47

Element X is a metal with a valency 2; Y is a non-metal with a valency 3.
(a) Write an equation to show how Y forms as ion
(b) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.

Exercise | Q 10 | Page 47

Element X is a metal with a valency 2; Y is a non-metal with a valency 3.
(a) Write an equation to show how Y forms as ion
(b) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.

Exercise | Q 11.1 | Page 47

An element L consists of molecules.
What type of bonding is present in the particles that make up L?

Exercise | Q 11.2 | Page 47

An element L consists of molecules.
Why L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?

Exercise [Page 48]

### Frank solutions for ICSE Class 10 Chemistry Part 2 Chapter 2 Chemical Bonding Exercise [Page 48]

Exercise | Q 1.1 | Page 48

The following table shows the electronic configuration of the elements W,X,Y,Z :

 Element W X Y Z ElectronicConfiguration 2,8,1 2,8,7 2,5 1

Answer the following questions based on the table above:
What type of bond is formed between W and X

Exercise | Q 1.1 | Page 48

The following table shows the electronic configuration of the elements W,X,Y,Z :

 Element W X Y Z ElectronicConfiguration 2,8,1 2,8,7 2,5 1

Answer the following questions based on the table above:
What type of bond is formed between Y and Z.

Exercise | Q 1.2 | Page 48

The following table shows the electronic configuration of the elements W,X,Y,Z :

 Element W X Y Z ElectronicConfiguration 2,8,1 2,8,7 2,5 1

Answer the following questions based on the table above:
What is the formula of the compound formed between X and Z.

Exercise | Q 1.2 | Page 48

The following table shows the electronic configuration of the elements W,X,Y,Z :

 Element W X Y Z ElectronicConfiguration 2,8,1 2,8,7 2,5 1

Answer the following questions based on the table above:
What is the formula of the compound formed between W and X.

Exercise | Q 2 | Page 48

The particles present in strong electrolytes are

• Only molecules

• Mainly ions

• Ions and molecules

• Only atoms

Exercise | Q 3 | Page 48

An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is

• 17

• 11

• 18

• 20

Exercise | Q 4 | Page 48

By drawing an electron dot diagram show the formation of Ammonium ion [Atomic No.: N = 7 and H = 1]

Exercise | Q 5 | Page 48

Fill in the blank from the choice given in bracket.
The compound that does not have a lone pair of electrons is ___________. (Water, Ammonia, carbon tetrachloride)

Exercise | Q 6 | Page 48

Which of the following is a common characteristic of a covalent compound?

• High melting point

• Consists of molecules

• Always soluble in water

• Conducts electricity when it is in the molten state

Exercise | Q 7.1 | Page 48

State the type of bonding in the following molecule.
Water

Exercise | Q 7.2 | Page 48

State the type of bonding in the following molecule.
Calcium oxide

Exercise | Q 8.1 | Page 48

Draw an electron dot diagram to show the formation of the following compound.
Methane

Exercise | Q 8.2 | Page 48

Draw an electron dot diagram to show the formation of the following compound.
Magnesium chloride [ H=1, C=6, Mg=12, Cl=17].

## Chapter 2: Chemical Bonding

ExerciseExercise Exercise 2

## Frank solutions for ICSE Class 10 Chemistry Part 2 chapter 2 - Chemical Bonding

Frank solutions for ICSE Class 10 Chemistry Part 2 chapter 2 (Chemical Bonding) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE ICSE Class 10 Chemistry Part 2 solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in ICSE Class 10 Chemistry Part 2 chapter 2 Chemical Bonding are Formation and Properties of Ionic Compounds, Concept of Coordinate Bond, Comparison of Electrovalent and Covalent Compounds, Characteristic Properties of Covalent Compounds, Concept of Covalent Bond, Characteristic Properties of Electrovalent Compounds, Structure of Electrovalent Compounds NaCl, MgCl2, CaO, Concept of Electrovalent, Concept of Chemical Bonding.

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