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

Chapters

Concise Chemistry Class 8 ICSE - Shaalaa.com
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Chapter 9: Carbon and Its Compounds

Exercise IExercise IIExercise IIIExercise IV
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Exercise I[Pages 129 - 130]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 9 Carbon and Its CompoundsExercise 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. 

Exercise II[Pages 138 - 139]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 9 Carbon and Its CompoundsExercise 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

Exercise III[Page 148]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 9 Carbon and Its CompoundsExercise 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.

Exercise IV[Page 151]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 9 Carbon and Its CompoundsExercise 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 →

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 Allotropy and Allotropes of Carbon, Uses of Diamond, Graphite, Coke, Coal, Soot, Laboratory Preparation 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, Allotropy and Allotropes of Carbon, Properties of Carbon Dioxide, Properties of Carbon Dioxide, Carbon: a Versatile Element.

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

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