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Selina solutions for Concise Chemistry Class 8 ICSE chapter 3 - Elements, Compounds and Mixtures [Latest edition]

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Concise Chemistry Class 8 ICSE - Shaalaa.com

Chapter 3: Elements, Compounds and Mixtures

Exercise 3(A)Exercise 3(B)

Exercise 3(A) [Page 24]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 3 Elements, Compounds and Mixtures Exercise 3(A) [Page 24]

Exercise 3(A) | Q 1.1 | Page 24

Define: Elements

Exercise 3(A) | Q 1.2 | Page 24

Define: Compounds

Exercise 3(A) | Q 2.1 | Page 24

Give two examples for the following: Metals

Exercise 3(A) | Q 2.2 | Page 24

Give Two Examples for Each of the Following: Non-metals

Exercise 3(A) | Q 2.3 | Page 24

Give Two Examples for Each of the Following: Metalloids

Exercise 3(A) | Q 2.4 | Page 24

Give Two Examples for Each of the Following: Inert Gases

Exercise 3(A) | Q 3.1 | Page 24

Differentiate between:
pure and impure substances

Exercise 3(A) | Q 3.2 | Page 24

Differentiate between:

Homogenous and heterogenous substances

Exercise 3(A) | Q 4.1 | Page 24

Write the Chemical Name of the Following and Also Give Their Molecular Formulae:

Baking Soda

Exercise 3(A) | Q 4.2 | Page 24

Write the Chemical Name of the Following and Also Give Their Molecular Formulae:

Vinegar

Exercise 3(A) | Q 4.3 | Page 24

Write the Chemical Name of the Following and Also Give Their Molecular Formulae:

Marble

Exercise 3(A) | Q 4.4 | Page 24

Write the Chemical Name of the Following and Also Give Their Molecular Formulae:

Sand

Exercise 3(A) | Q 5.1 | Page 24

Name: a soft metal

Exercise 3(A) | Q 5.2 | Page 24

Name: a Metal Which is brittle

Exercise 3(A) | Q 5.3 | Page 24

Name: a non-metal which is lustrous

Exercise 3(A) | Q 5.4 | Page 24

Name: a Liquid Metal

Exercise 3(A) | Q 5.5 | Page 24

Name: a Metal Which is a Poor Conductor of Electricity.

Exercise 3(A) | Q 5.6 | Page 24

Name: a Non-metal Which is a Good Conductor of Electricity.

Exercise 3(A) | Q 5.7 | Page 24

Name: a Liquid Non-metal

Exercise 3(A) | Q 5.8 | Page 24

Name: the Hardest Naturally Occurring Substance

Exercise 3(A) | Q 5.9 | Page 24

Name: an Inert Gas

Exercise 3(A) | Q 6 | Page 24

How is sodium chloride different from its constituent elements ?

Exercise 3(A) | Q 7 | Page 24

Why is iron sulphide a compound ?

Exercise 3(B) [Page 35]

Selina solutions for Concise Chemistry Class 8 ICSE Chapter 3 Elements, Compounds and Mixtures Exercise 3(B) [Page 35]

Exercise 3(B) | Q 1 | Page 35

Classify the following substances into compounds and mixtures:

Exercise 3(B) | Q 2.1 | Page 35

Give one example for the following type of mixtures
solid-solid homogenous mixture.

Exercise 3(B) | Q 2.2 | Page 35

Give one example for the following types of mixtures :

solid-liquid heterogenous mixture.

Exercise 3(B) | Q 2.3 | Page 35

Give one example for the following types of mixtures :

misicible liquids

Exercise 3(B) | Q 2.4 | Page 35

Give one example for the following types of mixtures: 

liquid-gas homogenous mixture

Exercise 3(B) | Q 3.1 | Page 35

Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.

Salt from sea water

Exercise 3(B) | Q 3.2 | Page 35

Suggest a suitable technique to separate the constituents of the following mixtures.  Also give the reason for selecting the particular method.

Ammonium chloride from sand

Exercise 3(B) | Q 3.3 | Page 35

Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.

Chalk powder from water

Exercise 3(B) | Q 3.4 | Page 35

Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method :

Iron from sulphur 

Exercise 3(B) | Q 3.5 | Page 35

Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.

Water and alcohol

Exercise 3(B) | Q 3.6 | Page 35

Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.

Sodium chloride and potassium nitrate

Exercise 3(B) | Q 3.7 | Page 35

Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.

Calcium carbonate and sodium chloride

Exercise 3(B) | Q 4.1 | Page 35

Define mixture. 

Exercise 3(B) | Q 4.2 | Page 35

Why is it necessary to separate the constituents of a mixture.

Exercise 3(B) | Q 4.3 | Page 35

State four differences between compounds and mixtures.

Exercise 3(B) | Q 5.1 | Page 35

What is chromatography? For which type of mixture is it used?

Exercise 3(B) | Q 5.2 | Page 35

What are the advantages of chromatography?

Exercise 3(B) | Q 5.3 | Page 35

Give two applications of chromatography.

Exercise 3(B) | Q 6.1 | Page 35

Choose the most appropriate answer: 

A mixture of sand and ammonium chloride can be separated by

  • filtration

  • distillation 

  • sublimation 

  • crystallisation 

Exercise 3(B) | Q 6.2 | Page 35

Choose the most appropriate answer

 A pair of metalloids are

  • Na and Mg

  • B and Si

  • C and P 

  • He and A

Exercise 3(B) | Q 6.3 | Page 35

Choose the most appropriate answer 

 Which of the following property is not shown by compounds?

  • They are heterogeneous. 

  • They are homogeneous

  • They have definite molecular formulae. 

  • They have fixed melting and boiling points 

Exercise 3(B) | Q 6.4 | Page 35

Choose the most appropriate answer 

 A solvent of Iodine is

  • Water 

  • Kerosene oil

  • Alcohol 

  • Petrol 

Exercise 3(B) | Q 6.5 | Page 35

Choose the most appropriate answer

Which of the gas is highly soluble in water ?

  • Ammonia 

  • Nitrogen 

  • Carbon monoxide 

  • Oxygen 

Chapter 3: Elements, Compounds and Mixtures

Exercise 3(A)Exercise 3(B)
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Concise Chemistry Class 8 ICSE - Shaalaa.com

Selina solutions for Concise Chemistry Class 8 ICSE chapter 3 - Elements, Compounds and Mixtures

Selina solutions for Concise Chemistry Class 8 ICSE chapter 3 (Elements, Compounds and Mixtures) 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.

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Concepts covered in Concise Chemistry Class 8 ICSE chapter 3 Elements, Compounds and Mixtures are Concept of Elements, Compounds and Mixture, Separation of the Components of a Mixture, Emphasis on the Principle of Separation.

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