Share
Notifications

View all notifications
Advertisement

Selina solutions for Concise Chemistry Class 8 ICSE chapter 9 - Carbon and Its Compounds [Latest edition]

Login
Create free account


      Forgot password?

Chapters

Concise Chemistry Class 8 ICSE - Shaalaa.com

Chapter 9: Carbon and Its Compounds

Exercise-IExercise-IIExercise-IIIExercise-IV

Exercise-I [Pages 129 - 130]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 9 Carbon and Its Compounds Exercise-I [Pages 129 - 130]

Exercise-I | Q 1.1 | Page 129

Fill in the blank

 ................. is present in both living and non-living things.

Exercise-I | Q 1.2 | Page 129

Fill in the blank.

The tendency of an element to exist in two or more forms but in the same physical state is called ................

Exercise-I | Q 1.3 | Page 129

 Fill in the blanks

........................ and .................... are the two major crystalline allotropes of carbon.

Exercise-I | Q 1.4 | Page 129

Fill in the blank.

............. is the hardest substance that occurs naturally.

Exercise-I | Q 1.5 | Page 129

Fill in the blank.

The name ‘carbon’ is derived from the Latin word...........

Exercise-I | Q 2.1 | Page 129

Choose the correct alternative.

In combined state, carbon occurs as

  • coal

  • diamond

  • graphite

  • petroleum

Exercise-I | Q 2.2 | Page 129

Choose the correct alternative.

 A crystalline form of carbon is

  • lampblack

  • gas carbon

  • sugar

  • fullerene

Exercise-I | Q 2.3 | Page 129

Choose the correct alternative.

Graphite is not found in

  • Bihar

  • Maharashtra

  • Orissa

  • Rajasthan

Exercise-I | Q 2.4 | Page 129

Choose the correct alternative.

Diamond is used for

  • making the electrodes of electric furnaces.

  • making crucible for melting metals.

  • cutting and drilling rocks and glass.

  • making carbon brushes for electric motors.

Exercise-I | Q 2.5 | Page 130

Choose the correct alternative.

Carbon forms innumerable compounds because

  • it has four electrons in its outermost shell.

  • it behaves as a metal as well as a non- metal.

  • carbon atoms can form long chains

  • it combines with other elements to form covalent compounds.

Exercise-I | Q 3.1 | Page 130

Write true or false

Carbon constitues 0.03% of the earth’s crust.

  • True

  • False

Exercise-I | Q 3.2 | Page 130

Write true or false

Graphite is the purest form of carbon.

  • True

  • False

Exercise-I | Q 3.3 | Page 130

Write true or false

Coloured diamonds are costlier than colourless and transparent diamonds

  • True

  • False

Exercise-I | Q 3.4 | Page 130

Write true or false

Graphite has layers of hexagonal carbon bondings. 

  • True

  • False

Exercise-I | Q 3.5 | Page 130

Write true or false

Diamond is insoluble in all solvents. 

  • True

  • False

Exercise-I | Q 4.1 | Page 130

Define the Following Term: Allotropy

Exercise-I | Q 4.2 | Page 130

Define the Following Term :

Carat

Exercise-I | Q 4.3 | Page 130

Define the Following Term:

Crystal

Exercise-I | Q 4.4 | Page 130

Define the Following Term:

Catenation

Exercise-I | Q 5.1 | Page 130

State the term:

Substances whose atoms or molecules are arranged in a definite pattern. 

Exercise-I | Q 5.2 | Page 130

State the term:

Different forms of an element found in the same physical state. 

Exercise-I | Q 5.3 | Page 130

State the term:

The property by which atoms of an element link together to form long chain or ring compounds. 

Exercise-I | Q 6.1 | Page 130

Name the following:

The hardest naturally occurring substance.

Exercise-I | Q 6.2 | Page 130

Name the following:

A greyish black non- metal that is a good conductor of electricity. 

Exercise-I | Q 6.3 | Page 130

Name the following:

The third crystalline form of carbon. 

Exercise-I | Q 7.1 | Page 130

Answer the following question

Why is graphite a good conductor of electricity but not diamond?

Exercise-I | Q 7.2 | Page 130

Answer the following question

Why is diamond very hard?

Exercise-I | Q 7.3 | Page 130

Answer the following question

What are fullerenes? Name the most common fullerenes.

Exercise-I | Q 7.4 | Page 130

Answer the following question

What impurity is present in black diamond?

Exercise-I | Q 7.5 | Page 130

Answer the following question

Explain the softness of graphite with reference to its structure.

Exercise-I | Q 8.1 | Page 130

Give two uses of graphite.

Exercise-I | Q 8.2 | Page 130

Give two uses of diamond.

Exercise-I | Q 9 | Page 130

Write three differences between graphite and diamond. 

Advertisement

Exercise-II [Pages 138 - 139]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 9 Carbon and Its Compounds Exercise-II [Pages 138 - 139]

Exercise-II | Q 1.1 | Page 138

Fill in the blank

.............is formed when charcoal is burnt in a limited supply of air.

Exercise-II | Q 1.2 | Page 138

Fill in the blank

Coal is a ............. form of carbon.

Exercise-II | Q 1.3 | Page 138

Fill in the blank:

......... is the most inferior form of coal.

Exercise-II | Q 1.4 | Page 138

Fill in the blank

Wood charcoal is a..........conductor of heat and electricity.

Exercise-II | Q 1.5 | Page 138

Fill in the blank

...............is used in making black shoe polish.

Exercise-II | Q 2.1 | Page 138

Choose the correct alternative

Anthracite is

  • an inferior type of coal

  • a superior type of coal

  • a cheapest form of coal

  • none of above

Exercise-II | Q 2.2 | Page 138

Choose the correct alternative

Destructive distillation of coal yields

  • coal tar

  • coal gas

  • coke

  • all of the above

Exercise-II | Q 2.3 | Page 138

Choose the correct alternative

Lamp black is

  • an amorphous form of carbon

  • a crystalline form of carbon

  • a pure form of carbon

  • a cluster of carbon atoms

Exercise-II | Q 2.4 | Page 138

Choose the correct alternative

The process by which decayed plants slowly convert into coal is called.

  • petrification

  • carbonisation

  • carbonification

  • fermentation

Exercise-II | Q 2.5 | Page 138

Choose the correct alternative

The purest form of the amorphous carbon is

  • wood charcoal

  • sugar charcoal

  • bone charcoal

  • lampblack

Exercise-II | Q 3.1 | Page 138

Write ‘True’ Or ‘False’ Against the Following Statement: 

Charcoal is a good adsorbent.

  • True

  • False

Exercise-II | Q 3.2 | Page 138

Write ‘true’ or ‘false’ against the following statement:

Coke is obtained by destructive distillation of sugar.

  • True

  • False

Exercise-II | Q 3.3 | Page 138

Write ‘true’ or ‘false’ against the following statement:

Activated charcoal is a good conductor of electricity. 

  • True

  • False

Exercise-II | Q 3.4 | Page 138

Write ‘true’ or ‘false’ against the following statement:

Wood charcoal is an important constituent of gun powder.

  • True

  • False

Exercise-II | Q 3.5 | Page 138

Write ‘true’ or ‘false’ against the following statement:

Coal gas is used in the preparation of artificial ferilizers. 

  • True

  • False

Exercise-II | Q 4.1 | Page 138

Define the following:

Carbonization

Exercise-II | Q 4.2 | Page 138

Define the following:

Adsorption

Exercise-II | Q 4.3 | Page 138

Define the following:

Bone black

Exercise-II | Q 5.1 | Page 138

Name the following:

Substances whose atoms or molecules are not arranged in a geometrical pattern. 

Exercise-II | Q 5.2 | Page 138

Name the following:

The best variety of coal. 

Exercise-II | Q 5.3 | Page 138

Name the following:

The purest form of amorphous carbon. 

Exercise-II | Q 5.4 | Page 138

Name the following:

An amorphous form of carbon that contains about 98% carbon. 

Exercise-II | Q 5.5 | Page 138

Name the following:

 Mixture of carbon monoxide and hydrogen. 

Exercise-II | Q 6.1 | Page 138

What is destructive distillation? What are the products formed due to the destructive distillation of coal?

Exercise-II | Q 6.2 | Page 138

 Why is wood charcoal used in water filters and gas masks?

Exercise-II | Q 6.3 | Page 138

How is wood charcoal made locally? What other substances are formed in the process.

Exercise-II | Q 6.4 | Page 138

How many carbon atoms are there in Buckminster fullerenes?

Exercise-II | Q 7.1 | Page 139

Descirbe the formation of coal

Exercise-II | Q 7.2 | Page 139

Name four types of coal with percentage of carbon present in each,with uses.

Exercise-II | Q 8.1 | Page 139

Name the products formed when:

wood is burnt in the absence of air.

Exercise-II | Q 8.2 | Page 139

Name the products formed when:

bone is heated in the absence of air.

Exercise-II | Q 8.3 | Page 139

Name the products formed when:
 diamond is burnt in air at 900°C.

Exercise-II | Q 8.4 | Page 139

Name the products formed when:

 graphite is subjected to high pressure and 3000°C temperature.

Exercise-II | Q 9.1 | Page 139

Give two uses for the following: 

coal

Exercise-II | Q 9.2 | Page 139

Give two uses for  the following:

coke

Exercise-II | Q 9.3 | Page 139

Give two uses for  the following:

wood charcoal

Exercise-II | Q 9.4 | Page 139

Give two uses for the following:

sugar charcoal

Exercise-II | Q 9.5 | Page 139

Give two uses for the following:

bone charcoal

Exercise-II | Q 9.6 | Page 139

Give two uses for the following:

 lampblack

Advertisement

Exercise-III [Page 148]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 9 Carbon and Its Compounds Exercise-III [Page 148]

Exercise-III | Q 1.1 | Page 148

Name the chemicals required for the preparation of carbon dioxide in the laboratory.

Exercise-III | Q 1.2 | Page 148

 How will you collect the gas ?

Exercise-III | Q 1.3 | Page 148

Write the balanced chemical equation for the above reaction.

Exercise-III | Q 1.4 | Page 148

Draw a labelled diagram for the preparation of CO2 in the laboratory.

Exercise-III | Q 1.5 | Page 148

Why is sulphuric acid not used for the preparation of carbon dioxide in the laboratory 

Exercise-III | Q 2.1 | Page 148

Write the balanced chemical equation for the preparation of carbon dioxide by:

heating calcium carbonate.

Exercise-III | Q 2.2 | Page 148

Write the balanced chemical equations for the preparation of carbon dioxide by: 

the action of acetic acid on sodium bicarbonate.

Exercise-III | Q 2.3 | Page 148

Write the balanced chemical equations for the preparation of carbon dioxide by:

the action of dilute sulphuric acid on sodium bicarbonate.

Exercise-III | Q 3.1 | Page 148

What happens when a lit splinter is introduced into a jar containing carbon dioxide ?

Exercise-III | Q 3.2 | Page 148

What happens when moist blue litmus paper is placed in a jar containing carbon dioxide?

Exercise-III | Q 3.3 | Page 148

What happens when carbon dioxide is passed through lime water first in small amounts and then in excess ?

Exercise-III | Q 3.4 | Page 148

What happens when a baking mixture containing baking powder is heated?

Exercise-III | Q 3.5 | Page 148

What happens when a soda water bottle is opened ?

Exercise-III | Q 4.1 | Page 148

Give reason for the following:

An excess of carbon dioxide increases the temperature of the earth.

Exercise-III | Q 4.2 | Page 148

Give reason for the following:

Soda acid and foam types of fire extinguisher are not used for extinguishing electrical fires.

Exercise-III | Q 4.3 | Page 148

Give reason for the following:

Solid carbon dioxide is used for refrigeration of food.

Exercise-III | Q 5 | Page 148

What is a fire extinguisher ? What is the substance used in the modern type of fire extinguishers ? How is it an improvement over the soda acid-type and the foam-type fire extinguishers ?

Exercise-III | Q 6 | Page 148

Explain the term ‘green house effect’. How can it be both beneficial and harmful for life on earth ?

Exercise-III | Q 7 | Page 148

What steps should be taken to balance carbon dioxide in the atmosphere ?

Exercise-III | Q 8 | Page 148

State three ways by which carbon dioxide gas is added into the atmosphere.

Advertisement

Exercise-IV [Page 151]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 9 Carbon and Its Compounds Exercise-IV [Page 151]

Exercise-IV | Q 1.1 | Page 151

Fill in the blank

....................... is formed when carbon is burnt in a limited supply of air or oxygen.

Exercise-IV | Q 1.2 | Page 151

Fill in the blank

Carbon monoxide bums in air with a .............. flame to form carbon dioxide.

Exercise-IV | Q 1.3 | Page 151

Fill in the blank:

Carbon monoxide is a products of..................combustion.

Exercise-IV | Q 1.4 | Page 151

Fill in the blank:

 A mixture of 95% oxygen and 5% carbon dioxide is called .................

Exercise-IV | Q 1.5 | Page 151

Fill in the blank:

carbon dioxide is used as a..................... in the extraction of pure metals from their corresponding ores.

Exercise-IV | Q 2 | Page 151

Match the colunm 

       column  A         column B
1. A product of incomplete burning  a. Hopcolite     
2. Nature of carben monoxide  b. Combustible gas 
3. A compound formed by the combination of haemoglobin and carbon monoxide  c. carboxy-haemoglobin
4. A mixture of metallic oxides  d. Carbon monoxide 
5. Carbon monoxide  e. Highly poisonous 
Exercise-IV | Q 3 | Page 151

How is carbon monoxide gas formed?

Exercise-IV | Q 4 | Page 151

State the poisonous nature of carbon monoxide?

Exercise-IV | Q 5 | Page 151

Give two uses of carbon monoxide.

Exercise-IV | Q 6 | Page 151

Why is carbon monoxide called silent killer ?

Exercise-IV | Q 7 | Page 151

Explain the reducing action of carbon monoxide.

Exercise-IV | Q 8 | Page 151

Write two remedies for carbon monoxide poisoning.

Exercise-IV | Q 9.1 | Page 151

Complete the reactions and balance them.
CuO + CO →

Exercise-IV | Q 9.2 | Page 151

Complete the reaction and balance them.

Fe2O2 + CO →

Advertisement

Chapter 9: Carbon and Its Compounds

Exercise-IExercise-IIExercise-IIIExercise-IV
Concise Chemistry Class 8 ICSE - Shaalaa.com

Selina solutions for Concise Chemistry Class 8 ICSE chapter 9 - Carbon and Its Compounds

Selina solutions for Concise Chemistry Class 8 ICSE chapter 9 (Carbon and Its Compounds) 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 8 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 8 ICSE chapter 9 Carbon and Its Compounds are Allotropes of Carbon, Crystalline and Amorphous Nature of Allotropes of Carbon, Uses of Diamond, Graphite, Coke, Coal, Soot, Laboratory Preparation, Properties and Uses of Carbon Dioxide, Physical Properties of Carbon Dioxide, Chemical Properties of Carbon Dioxide, Reaction with Lime Water, Properties and Uses of Carbon Monoxide, Emphasis on Use as Reducing Agent in the Extraction of Iron, Emphasize the Harmful Properties of Carbon Monoxide When Inhaled - Asphyxia, Concept for Carbon and Its Compounds.

Using Selina Class 8 solutions Carbon and Its Compounds 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 8 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 9 Carbon and Its Compounds Class 8 extra questions for Concise Chemistry Class 8 ICSE and can use Shaalaa.com to keep it handy for your exam preparation

Advertisement
View in app×