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Balbharati solutions for Class 9 Science and Technology chapter 14 - Substances in Common Use

Balbharati Class 9 Science and Technology

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Balbharati Balbharati Class 9 Science and Technology

Balbharati Class 9 Science and Technology - Shaalaa.com

Chapter 14: Substances in Common Use

Exercise

Chapter 14: Substances in Common Use Exercise Exercise solutions [Page 162]

Exercise | Q 1.1 | Page 162

Fill in the blank.

The number of molecules of water of crystallization in washing soda is …........

Exercise | Q 1.2 | Page 162

Fill in the blank.

The chemical name of baking soda is …........

Exercise | Q 1.2 | Page 162

Fill in the blank.

The chemical name of baking soda is …........

Exercise | Q 1.3 | Page 162

Fill in the blank.

 .......….. is used in treatment of hyperthyroidism. 

Exercise | Q 1.4 | Page 162

Fill in the blank.
The chemical name of Teflon is …..........

Exercise | Q 2 | Page 162

Match the pairs 

Group A  Group B 
1.Saturated brine  a.sodium metal freed 
2.Fused salt  b.basic salt 
3.CaOCl c.crystallization of salt 

4.NaHCO3

d.oxidation of colour 
Exercise | Q 3.1 | Page 162

Write answer to the following 

What is meant by radioactivity ?

Exercise | Q 3.2 | Page 162

Write answer to the following

When is said to be the nucleus unstable? 

Exercise | Q 3.2 | Page 162

Write answer to the following

When is said to be the nucleus unstable? 

Exercise | Q 3.3 | Page 162

Write answer to the following

Which diseases are caused by artificial food colours ? 

Exercise | Q 3.3 | Page 162

Write answer to the following

Which diseases are caused by artificial food colours ? 

Exercise | Q 3.4 | Page 162

Write answer to the following

Where in the industrial field is radioactivity used? 

Exercise | Q 3.4 | Page 162

Write answer to the following

Where in the industrial field is radioactivity used? 

Exercise | Q 3.5 | Page 162

Write answer to the following

Write down properties of teflon. 

Exercise | Q 3.6 | Page 162

Write answer to the following

What type of colours will you use to celebrate ecofriendly Rang Panchami? Why? 

Exercise | Q 3.7 | Page 162

Write answer to the following

Why has the use of methods like Teflon coating become more common? 

Exercise | Q 4.1 | Page 162

Give scientific explanation

Bleaching powder has the odour of chlorine.

Exercise | Q 4.2 | Page 162

Give scientific explanation 

The hard water of a well becomes soft  on adding washing soda to it. 

Exercise | Q 4.3 | Page 162

Give scientific explanation 

Soap forms a precipitate in hard water. 

Exercise | Q 4.4 | Page 162

Give scientific explanation 

The particles of powder are given an electric charge while spraying them to form the powder coating.

Exercise | Q 4.4 | Page 162

Give scientific explanation 

The particles of powder are given an electric charge while spraying them to form the powder coating.

Exercise | Q 4.5 | Page 162

Give scientific explanation 

The aluminium article is used as an anode in the anodising process. 

Exercise | Q 4.5 | Page 162

Give scientific explanation 

The aluminium article is used as an anode in the anodising process. 

Exercise | Q 4.6 | Page 162

Give scientific explanation 

When the radiation coming out from certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path. 

Exercise | Q 4.7 | Page 162

Give scientific explanation 

A certain type of ceramic tiles are fixed on the outer layer of a space shuttle. 

Exercise | Q 4.7 | Page 162

Give scientific explanation 

A certain type of ceramic tiles are fixed on the outer layer of a space shuttle. 

Exercise | Q 5.1 | Page 162

Write answer to the following 

Write about artificial food colours, the substances used in them and their harmful effects. 

Exercise | Q 5.1 | Page 162

Write answer to the following 

Write about artificial food colours, the substances used in them and their harmful effects. 

Exercise | Q 5.2 | Page 162

Write answer to the following

What is meant by water of crystallization? Give examples of salts with water of crystallization, and their uses. 

Exercise | Q 5.3 | Page 162

Write answer to the following

Write briefly about the three methods of electrolysis of sodium chloride. 

Exercise | Q 6.1 | Page 162

Write the use. 

Anodizing 

Exercise | Q 6.1 | Page 162

Write the use. 

Anodizing 

Exercise | Q 6.2 | Page 162

Write the use.

Powder coating 

Exercise | Q 6.2 | Page 162

Write the use.

Powder coating 

Exercise | Q 6.3 | Page 162

Write the use.

Radioactive substances 

Exercise | Q 6.4 | Page 162

Write the use.

Ceramic 

Exercise | Q 6.4 | Page 162

Write the use.

Ceramic 

Exercise | Q 7.1 | Page 162

Write the harmful effects 

Artificial dye 

Exercise | Q 7.1 | Page 162

Write the harmful effects 

Artificial dye 

Exercise | Q 7.2 | Page 162

Write the harmful effects 

Artificial food colour 

Exercise | Q 7.2 | Page 162

Write the harmful effects 

Artificial food colour 

Exercise | Q 7.3 | Page 162

Write the harmful effects 

Radioactive substances 

Exercise | Q 7.4 | Page 162

Write the harmful effects 

Deodorant 

Exercise | Q 7.4 | Page 162

Write the harmful effects 

Deodorant 

Exercise | Q 8.1 | Page 162

Write the chemical formula 

Bleaching powder

Exercise | Q 8.2 | Page 162

Write the chemical formula 

common salt

Exercise | Q 8.3 | Page 162

Write the chemical formula 

baking soda

Exercise | Q 8.4 | Page 162

Write the chemical formula 

washing soda 

Exercise | Q 9 | Page 162

Explain what you see in the following picture

Exercise | Q 9 | Page 162

Explain what you see in the following picture

Chapter 14: Substances in Common Use

Exercise

Balbharati Balbharati Class 9 Science and Technology

Balbharati Class 9 Science and Technology - Shaalaa.com

Balbharati solutions for Class 9 Science and Technology chapter 14 - Substances in Common Use

Balbharati solutions for Class 9 chapter 14 (Substances in Common Use) 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 Maharashtra State Board Balbharati Class 9 Science and Technology 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. Balbharati textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 9 Science and Technology chapter 14 Substances in Common Use are Some chemical substances in day to day life., Some chemical substances in day to day life., Radioactive substances, Some crystalline salts : Soap, Washing soda Na2CO3.H2O, Bleaching powder (Calcium oxychloride CaOCl2), Sodium bicarbonate (Baking soda – NaHCO3), Sodium chloride (Table salt- NaCl).

Using Balbharati Class 9 solutions Substances in Common Use 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 Balbharati Solutions are important questions that can be asked in the final exam. Maximum students of Maharashtra State Board Class 9 prefer Balbharati Textbook Solutions to score more in exam.

Get the free view of chapter 14 Substances in Common Use Class 9 extra questions for and can use Shaalaa.com to keep it handy for your exam preparation

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