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Selina solutions for Concise Chemistry Class 10 ICSE chapter 2 - Chemical Bonding [Latest edition]

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Concise Chemistry Class 10 ICSE - Shaalaa.com

Chapter 2: Chemical Bonding

Intext QuestionsExercise - 2

Intext Questions [Pages 25 - 26]

Selina solutions for Concise Chemistry Class 10 ICSE Chapter 2 Chemical Bonding Intext Questions [Pages 25 - 26]

Intext Questions | Q 1 | Page 25

How do atoms attain noble gas configuration?

Intext Questions | Q 2.1 | Page 25

Define a chemical bond.

Intext Questions | Q 2.2 | Page 25

Define an electrovalent bond.

Intext Questions | Q 2.3 | Page 25

Define a covalent bond.

Intext Questions | Q 3 | Page 25

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

Intext Questions | Q 4 | Page 25

An atom X has three electrons more than the noble gas configuration. What type of ion will it form? Write the formula of its 
(i) sulphate
(ii) nitrate
(iii) phosphate
(iv) carbonate
(v) hydroxide

Intext Questions | Q 5 | Page 25

Mention the basic tendency of an atom which makes it to combine with other atoms.

Intext Questions | Q 6 | Page 25

The element X has the electronic configuration 2, 8, 18, 8, 1. Without identifying x,
(a) predict the sigh and charge on a simple ion of X.
(B) write if X be an oxidizing agent or reducing agent and why.

Intext Questions | Q 7 | Page 25

In the formation of the compound XY2, an atom X gives one electron to each Y atom. What is the nature of bond in XY2? Draw the electron dot structure of this compound.

Intext Questions | Q 8 | Page 25

An atom X has 2, 8, 7 electrons in its shell. It combines with Y having 1 electron in its outermost shell.
(a) What type of bond will be formed between X and Y?
(b) Write the formula of the compound formed.

Intext Questions | Q 9 | Page 25

Draw orbit structure and electron dot diagram of NaCI, MgCl2 and CaO.

Intext Questions | Q 10.1 | Page 25

Compare:

sodium atom and sodium ion
(i) atomic structure
(ii) electrical state
(iii) chemical action
(iv) toxicity

Intext Questions | Q 10.2 | Page 25

Compare:

chlorine atom and chloride ion, with respect to
(i) atomic structure
(ii) electrical state
(iii) chemical action
(iv) toxicity

Intext Questions | Q 11 | Page 25

The electronic configuration of fluoride ion is the same as that of a neon atom. What is the difference between the two?

Intext Questions | Q 12.1 | Page 25

State Which of the following is reduction reaction and Which is oxidation .

Pb → Pb2+ + 2e-

Intext Questions | Q 12.2 | Page 25

State Which of the following is reduction reaction and Which is oxidation .

Fe2+ - e- → Fe3+

Intext Questions | Q 12.3 | Page 25

State Which of the following is reduction reaction and Which is oxidation .

A3+ + e-1 → A2+ 

Intext Questions | Q 12.4 | Page 25

State Which of the following is reduction reaction and Which is oxidation .

Cu → Cu2+

Intext Questions | Q 13 | Page 25

What do you understand by redox reactions? Explain oxidation and reduction in terms of loss or gain of electrons.

Intext Questions | Q 14 | Page 25

Divide the following redox reactions into oxidation and reduction half reactions.

(i) Zn + Pb2+ → Zn2+ + Pb

(ii) Zn + Cu2+ → Zn2+ + Cu

(iii) Cl2 + 2Br- → Br2 + 2Cl-

(iv) Sn2+ + 2Hg2+ → Sn4+ + Hg2+

(v) 2Cu+ → Cu + Cu2+

Intext Questions | Q 15 | Page 26

Potassium (Atomic No. 19) and chlorine (Atomic No. 17) react to form a compound. On the basis of electronic concept, explain

(i) oxidation

(ii) reduction

(iii)oxidising agent

(iv)reducing agent

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Intext Questions [Page 32]

Selina solutions for Concise Chemistry Class 10 ICSE Chapter 2 Chemical Bonding Intext Questions [Page 32]

Intext Questions | Q 1 | Page 32

What are the conditions necessary for the formation of covalent molecules?

Intext Questions | Q 2 | Page 32

Elements A, B and C have atomic number 17, 19 and 10 respectively.
(a) State which one is: (i) a non-metal (ii) a metal, (iii) chemically inert?
(b) write down the formula of the compound formed by two of the above elements.

Intext Questions | Q 3.1 | Page 32

Draw the electron dot diagram and structure of :

nitrogen molecule

Intext Questions | Q 3.2 | Page 32

Draw the electron dot diagram and structure of :

magnesium chloride

Intext Questions | Q 3.3 | Page 32

Draw the electron dot diagram and structure of :

methane

Intext Questions | Q 4.1 | Page 32

What is the difference between ionic compounds and polar covalent compounds.

Intext Questions | Q 4.2 | Page 32

What is the difference between :

Ionic compounds and covalent compounds

Intext Questions | Q 4.3 | Page 32

What is the difference between :

A polar covalent compound and a non-polar covalent compound?

Intext Questions | Q 5 | Page 32

A solid is crystalline, has a high melting point and is water soluble. Describe the nature of the solid.

Intext Questions | Q 6 | Page 32

What do you understand by dipole (polar) molecule ? Explain it by taking hydrogen chloride as an example ? 

Intext Questions | Q 7.1 | Page 32

Explain the bonding in methane molecule using electron dot structure.

Intext Questions | Q 7.2 | Page 32

Methane molecule is non-polar molecule. Explain.

Intext Questions | Q 8.1 | Page 32

Give the characteristic properties of electrovalent compounds.

Intext Questions | Q 8.2 | Page 32

Give the characteristic properties of covalent compounds.

Intext Questions | Q 9.1 | Page 32

State the type of bond is formed when the combining atoms have :

zero E.N. difference 

Intext Questions | Q 9.1 | Page 32

State the type of bond is formed when the combining atoms have :

small E.N. difference

Intext Questions | Q 9.1 | Page 32

State the type of bond is formed when the combining atoms have :

large E.N. difference

Intext Questions | Q 9.2 | Page 32

State the type of bond formed, and draw Lewis structure of water

Intext Questions | Q 9.2 | Page 32

State the type of bond formed, and draw Lewis structure of calcium oxide

Intext Questions | Q 10.1 | Page 32

Explain the following:
Electrovalent compounds conduct electricity.

Intext Questions | Q 10.2 | Page 32

Explain the following:
Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points.

Intext Questions | Q 10.3 | Page 32

Explain the following:
Electrovalent compounds dissolve in water whereas covalent compounds do not.

Intext Questions | Q 10.4 | Page 32

Explain the following:
Electrovalent compounds are usually hard crystals.

Intext Questions | Q 10.5 | Page 32

Explain the following : 

Polar covalent compounds conduct electricity ?

Intext Questions | Q 10.6 | Page 32

Explain the following :

Water is a polar covalent molecule ? 

Intext Questions | Q 11.1 | Page 32

Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one : forms an anion

Intext Questions | Q 11.2 | Page 32

Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one:

forms a cation

Intext Questions | Q 11.3 | Page 32

Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one :

State type of bond between Y and Z and give its molecular formula.

Intext Questions | Q 12 | Page 32

Taking MgCI2 as an electrovalent compound, CCI4 as a covalent compound, give four differences between electrovalent and covalent compounds.

Intext Questions | Q 13 | Page 32

Potassium chloride is an electrovalent compound, while hydrogen chloride is a covalent compound. But, both conducts electricity in their aqueous solutions. Explain.

Intext Questions | Q 14.1 | Page 32

Draw the electron dot structure of covalent compound methane (non polar) and HCL (polar) and give two difference between them .

Intext Questions | Q 14.2 | Page 32

Name two compounds that are covalent when taken pure but produce ions when dissolved in water.

Intext Questions | Q 14.3 | Page 32

For each compound mentioned above give the formulae of ions formed in aqueous solution.

Intext Questions | Q 15 | Page 32

An element M burns in oxygen to form an ionic bond MO. Write the formula of the compounds formed if this element is made to combine with chlorine and sulphur separately.

Intext Questions | Q 16.1 | Page 32

Element A has 2 electrons in its M shell. Element B has atomic number 7.

Write equations to show how A and B form ions.

Intext Questions | Q 16.2 | Page 32

Element A has 2 electrons in its M shell. Element B has atomic number 7.

If B is a diatomic gas, write the equation for the direct combination of A and B to form a compound.

Intext Questions | Q 16.3 | Page 32

Element A has 2 electrons in its M shell. Element B has atomic number 7.

If the compound formed between A and B is melted and an electric current is passed through the molten compound , the element A will be obtained at the _________ and B at the ___________ of the electrolytic cell.

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Exercise - 2 [Pages 35 - 36]

Selina solutions for Concise Chemistry Class 10 ICSE Chapter 2 Chemical Bonding Exercise - 2 [Pages 35 - 36]

Exercise - 2 | Q 1 | Page 35

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

Exercise - 2 | Q 2 | Page 35

What do you understand by lone pair of electrons ?

Exercise - 2 | Q 3.1 | Page 35

State the type of bonding in the following molecule.
Water

Exercise - 2 | Q 3.2 | Page 35

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

Exercise - 2 | Q 3.3 | Page 35

State the type of bonding in the following molecule.
hydroxyl ion

Exercise - 2 | Q 3.4 | Page 35

State the type of bonding in the following molecule.
methane

Exercise - 2 | Q 3.5 | Page 35

State the type of bonding in the following molecule.
ammonium ion

Exercise - 2 | Q 3.6 | Page 35

State the type of bonding in the following molecule.
ammonium chloride

Exercise - 2 | Q 4.1 | Page 35

Draw an electron dot diagram for the formation of the following . State the type of bonding present in them .
Ammonium ion

Exercise - 2 | Q 4.1 | Page 35

Draw an electron dot diagram for the formation of the following . State the type of bonding present in them .

Hydronium ion .

Exercise - 2 | Q 4.1 | Page 35

Draw an electron dot diagram for the formation of the following . State the type of bonding present in them .
Hydroxyl ion

Exercise - 2 | Q 4.2 | Page 35

Give two example in following case:

Co-ordinate bond compounds

Exercise - 2 | Q 4.2 | Page 35

Give two example in following case:
solid covalent compounds

Exercise - 2 | Q 4.2 | Page 35

Give two example in following case:
Gaseous polar compounds

Exercise - 2 | Q 4.2 | Page 35

Give two example in following case:
Gaseous non polar compounds

Exercise - 2 | Q 4.2 | Page 35

Give two example in following case:
Liquid non polar compounds

Exercise - 2 | Q 5 | Page 35

Element M forms a chloride with the formula MCI2 which is a solid with high melting point. M would most likely be in the group in which ………….. is placed.

  • Na

  • Mg

  • Al

  • Si

Exercise - 2 | Q 6 | Page 35

Complete the following:

  Sodium Phosphorus carbon
Formula of chloride      
Nature of bonding      
Physical state of chloride      
Exercise - 2 | Q 7.1 | Page 35

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

Exercise - 2 | Q 7.2 | Page 35

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

Exercise - 2 | Q 8.1 | Page 35

Complete the following:
When the nuclei of two different reacting atoms are of ……………… mass, then a bond so formed is called ……………… covalent band (Equal, unequal, polar, non-polar).

Exercise - 2 | Q 8.2 | Page 35

Complete the following:

In case of non-polar covalent bond, the covalent bond is formed in the ……………. Of atoms and shared electrons are …………. Distributed (corner, middle, equally, unequally).

Exercise - 2 | Q 8.3 | Page 35

Complete the following:

Ionic or electrovalent compounds do not conduct electricity in their …………… state.

  • Fused

  • solid

Exercise - 2 | Q 8.4 | Page 35

Complete the following:

The ions in ……………… compounds are held very strongly due strong ……. Forces (electrovalent, covalent, electromagnetic, electrostatic).

Exercise - 2 | Q 9.1 | Page 35

Compound X consists of molecules.

Choose the letter corresponding to the correct answer from the options A, B, C and D given below : 

The type of bonding in X will be 

  •  ionic 

  • electrovalent

  • covalent

  • molecular

Exercise - 2 | Q 9.2 | Page 35

Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the options 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 - 2 | Q 9.3 | Page 35

Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the options A, B, C and D given below:

In the liquid state, X will

  • become ionic

  • be an electrolyte

  • conduct electricity

  • not conduct electricity

Exercise - 2 | Q 10.1 | Page 35

Electrons are getting added to an element Y: 

Is Y getting oxidised or reduced?

Exercise - 2 | Q 10.1 | Page 35

Electrons are getting added to an element Y: 

What electrode will Y migrate to during the process of electrolysis? 

Exercise - 2 | Q 10.2 | Page 35

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

Exercise - 2 | Q 10.3 | Page 35

Explain why carbon tetrachloride does not dissolve in water.

Exercise - 2 | Q 11.1 | Page 35

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

Exercise - 2 | Q 11.2 | Page 35

Can Q and S both be metals? Justify your answer.

Exercise - 2 | Q 11.3 | Page 35

The property which is characteristic of an electrovalent compound is that :

  •  it is easily vaporised

  • it has a high melting point

  • it is a weak electrolyte

  • it often exists as a liquid 

Exercise - 2 | Q 11.4 | Page 35

When a metal atom becomes an ion,

  •  it loses electrons and is oxidised

  • it gains electrons and is reduced

  •  it gains electrons and is oxidised

  •  it loses electrons and is reduced

Exercise - 2 | Q 12.1 | Page 36

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

Exercise - 2 | Q 12.2 | Page 36

What are the term defined below?

A bond formed by share pair of electrons, each bonding atom contributing one electron to the pair.

Exercise - 2 | Q 12.2 | Page 36

What are the term defined below?

A bond formed by a shared pair of electrons with both electrons coming from the same atom.

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Chapter 2: Chemical Bonding

Intext QuestionsExercise - 2
Concise Chemistry Class 10 ICSE - Shaalaa.com

Selina solutions for Concise Chemistry Class 10 ICSE chapter 2 - Chemical Bonding

Selina solutions for Concise Chemistry Class 10 ICSE 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 Concise Chemistry Class 10 ICSE solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Concise Chemistry Class 10 ICSE 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.

Using Selina Class 10 solutions Chemical Bonding exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 10 prefer Selina Textbook Solutions to score more in exam.

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