Chapters
Chapter 2: Work and Energy
Chapter 3: Current Electricity
Chapter 4: Measurement of Matter
Chapter 5: Acids, Bases and Salts
Chapter 6: Classification of Plants
Chapter 7: Energy Flow in an Ecosystem
Chapter 8: Useful and Harmful Microbes
Chapter 9: Environmental Management
Chapter 10: Information Communication Technology (ICT)
Chapter 11: Reflection of Light
Chapter 12: Study of Sound
Chapter 13: Carbon : An important element
Chapter 14: Substances in Common Use
Chapter 15: Life Processes in Living Organisms
Chapter 16: Heredity and Variation
Chapter 17: Introduction to Biotechnology
Chapter 18: Observing Space : Telescopes
Chapter 14: Substances in Common Use
Balbharati solutions for Science and Technology 9th Standard Maharashtra State Board Chapter 14 Substances in Common Use Exercise [Page 162]
Fill in the blank.
The number of molecules of water of crystallization in washing soda is …........
Fill in the blank.
The chemical name of baking soda is …........
Fill in the blank.
.......….. is used in treatment of hyperthyroidism.
Fill in the blank.
The chemical name of Teflon is …..........
Match the pairs
| Group A | Group B |
| 1.Saturated brine | a.sodium metal freed |
| 2.Fused salt | b.basic salt |
| 3.CaOCl2 | c.crystallization of salt |
|
4.NaHCO3 |
d.oxidation of colour |
Write Answer to the Following
What is meant by radioactivity ?
When is said to be the nucleus unstable?
Which diseases are caused by artificial food colours ?
Where in the industrial field is radioactivity used?
Write down properties of teflon.
What type of colours will you use to celebrate ecofriendly Rang Panchami? Why?
Why has the use of methods like Teflon coating become more common?
Give scientific explanation
Bleaching powder has the odour of chlorine.
Give scientific explanation
The hard water of a well becomes soft on adding washing soda to it.
Give scientific explanation
Soap forms a precipitate in hard water.
Give scientific explanation
The particles of powder are given an electric charge while spraying them to form the powder coating.
Give scientific explanation
The aluminium article is used as an anode in the anodising process.
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.
Give scientific explanation
A certain type of ceramic tiles are fixed on the outer layer of a space shuttle.
Write about artificial food colours, the substances used in them and their harmful effects.
What is meant by water of crystallization? Give examples of salts with water of crystallization, and their uses.
Write briefly about the three methods of electrolysis of sodium chloride.
Write the use.
Anodizing
Write the use.
Powder coating
Write the use.
Radioactive substances
Write the use.
Ceramic
Write the harmful effects
Artificial dye
Write the harmful effects
Artificial food colour
Write the harmful effects
Radioactive substances
Write the harmful effects
Deodorant
Write the chemical formula
Bleaching powder
Write the chemical formula
common salt
Write the chemical formula
baking soda
Write the chemical formula
washing soda
Explain what you see in the following picture
Chapter 14: Substances in Common Use
Balbharati solutions for Science and Technology 9th Standard Maharashtra State Board chapter 14 - Substances in Common Use
Balbharati solutions for Science and Technology 9th Standard Maharashtra State Board 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 Science and Technology 9th Standard Maharashtra State Board 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 Science and Technology 9th Standard Maharashtra State Board chapter 14 Substances in Common Use are Hazards of Radioactive Substances and Radiation, Safety Precautions While Using Nuclear Energy, Chemicals from Common Salt (Uses of Salt), Preparation and Uses of Baking Soda, Preparation and Uses of Washing Soda, Soap, Radioactivity, Some Chemical Substances in Day to Day Life, Preparation and Uses of Bleaching Powder, Salts, Water of Crystallization, Uses of Radioactivity, Types of Radioactivity: Natural and Artificial (or) Induced Radioactivity, Radioactivity as Emission of Alpha, Beta, and Gamma Radiations, Properties of Alpha Particles, Properties of Beta Particles, Properties of Gamma Radiations.
Using Balbharati 9th Standard 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 9th Standard prefer Balbharati Textbook Solutions to score more in exam.
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