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Selina solutions for Class 10 Chemistry chapter 2 - Chemical Bonding

Selina ICSE Concise Chemistry for Class 10

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Selina Selina ICSE Concise Chemistry Class 10

Selina ICSE Concise Chemistry for Class 10

Chapter 2: Chemical Bonding

Chapter 2: Chemical Bonding solutions [Page 0]

How do atoms attain noble gas configuration?

Define a chemical bond.

Define an electrovalent bond.

Define a covalent bond.

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

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

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

What type of compounds are usually formed between metals and non-metals and why?

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.

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.

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

Compare:

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

Compare:

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

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

Chapter 2: Chemical Bonding solutions [Page 0]

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

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.

Five atoms are labelled from A to E.

Atoms Mass No. Atomic No.
A 40 20
B 19 9
C 7 3
D 16 8
E 14 7

(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?

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

What is the difference between a polar covalent compound and a non-polar covalent compound?

What is the difference between a polar covalent compound and a non-polar covalent compound?

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.

What do you understand by polar covalent compounds?

Explain polar covalent compounds by taking hydrogen chloride as an example.

Methane molecule is non-polar molecule. Explain.

Give the characteristic properties of electrovalent compounds.

Give the characteristic properties of covalent compounds.

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

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

Zn + cu2 → Zn2 + Cu

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

2Cu+ → Cu + Cu2+

Divide the following redox reaction into oxidation and reduction half reaction.
 Zn + Pb2 → Zn2 + Pb

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

CI2 + 2Br → Br2 + 2CI-

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

Sn2 + 2Hg2 → Sn4 + Hg22+

Potassium (at No .19) and chlorine (at No. 17) react to form a compound. Explain on the basis of electronic concept.
(i) oxidation
(ii) reduction
(iii) oxidizing agent
(iv) reducing agent

What do you understand by a dipole molecule? Give one example.

Chapter 2: Chemical Bonding solutions [Page 0]

Explain the following:
Electrovalent compounds conduct electricity.

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

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

Explain the following:
Electrovalent compounds are usually hard crystals yet brittle.

Explain the following:
polar covalent compounds electricity.

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

Match the atomic number 4, 8, 14, 15 and 19 with each of the following:
(a) A solid non-metal of valelncy 3.
(b) A gas of valency 2.
(c) A metal of valency 1.
(d) A non-metal of valency 4

.Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one:
(a) forms an anion,
(b) forms a cation,
(c) State type of bond between Y and Z and give its molecular formula.

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

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

(a) Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
(b) For each compound mentioned above give the formulae of ions formed in aqueous solution.

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.

Give electron dot diagram of the following:
Magnesium chloride

Give electron dot diagram of the following:
nitrogen

Give electron dot diagram of the following:
methane

State the type of bonding in the following molecule.
Water

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

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

State the type of bonding in the following molecule.
methane

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

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

Define a coordinate bond and give the conditions for its formation. Explain with an example.

What do you understand by lone pair and shared pair?

(i) How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
(ii) How many electrons are required for their octet structure?

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).

Complete the following:

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

Complete the following:

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

Draw an electron dot diagram to show the structure of the following and State the type of bonding present in it.
Ammonium ion

Draw an electron dot diagram to show the structure of the following and State the type of bonding present in it.
Hydronium ion

Draw an electron dot diagram to show the structure of the following and State the type of bonding present in it.
Hydroxyl ion

Give two example in following case:
Gaseous polar compounds

Give two example in following case:
solid covalent compounds

Give two example in following case:
Liquid non polar compounds

Give two example in following case:
Gaseous non polar compounds

Give two example in following case:

Co-ordinate bonds compounds

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.
[ (a) Na (b) Mg (c) Al (d) Si ]

Complete the following:

  Sodium Phosphorus carbon
Formula of chloride      
Nature of bonding      
Physical state of chloride      

Chapter 2: Chemical Bonding

Selina Selina ICSE Concise Chemistry Class 10

Selina ICSE Concise Chemistry for Class 10

Selina solutions for Class 10 Chemistry chapter 2 - Chemical Bonding

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

Further, we at Shaalaa.com are providing 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 Class 10 Chemistry chapter 2 Chemical Bonding are Concept of Chemical Bonding, 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, Formation and Properties of Ionic Compounds.

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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