Chapters
Chapter 2: Health and Diseases
Chapter 3: Force and Pressure
Chapter 4: Current Electricity and Magnetism
Chapter 5: Inside the Atom
Chapter 6: Composition of Matter
Chapter 7: Metals and Nonmetals
Chapter 8: Pollution
Chapter 9: Disaster Management
Chapter 10: Cell and Cell Organelles
Chapter 11: Human Body and Organ System
Chapter 12: Introduction to Acid and Base
Chapter 13: Chemical Change and Chemical Bond
Chapter 14: Measurement and Effects of Heat
Chapter 15: Sound
Chapter 16: Reflection of Light
Chapter 17: Man made Materials
Chapter 18: Ecosystems
Chapter 19: Life Cycle of Stars
Chapter 12: Introduction to Acid and Base
Balbharati solutions for General Science 8th Standard Maharashtra State Board Chapter 12 Introduction to Acid and Base Exercise [Page 88]
Identify the following solutions, whether they are acid or alkali.
| Solution | Change in Indicator | Acid/Alkali | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | ... | No change | ... | |
| 2. | ... | ... | Orange colour turns red | |
| 3. | Red litmus turns blue | ... | ... | |
Write chemical names from given formulae.
H2SO4, Ca(OH)2, HCl, NaOH, KOH, NH4OH
Sulphuric acid has the highest importance in the chemical industry. Why?
Which acid is used for getting chloride salt?
By squeezing lemon on a piece of rock the gas liberated turned lime water milky. which compound is present in the rock?
The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not?
Explain the difference between acid and alkali.
Why indicator does not get affected by salt?
Which substances are produced by the neutralization process?
Which are the industrial uses of acids?
Main constituent of acid is ____________.
Main constituent of alkali is _____________.
Tartaric acid is a................ acid.
Match the pairs.
| Group A | Group B |
| 1. Tamarind | a. Acetic acid |
| 2. Curd | b. Citric acid |
| 3. Lemon | c. Tartaric acid |
| 4.Vinegar | d. Lactic acid |
State true or false
Oxides of metals are alkaline in nature.
True
False
State true or false
Salt is acidic.
True
False
State true or false.
Metal corrodes due to salts
True
False
State true or false.
Salts are neutral.
True
False
Classify following substances into Acidic, Basic and Neutral group
HCl, NaCl, MgO, KCl, H2SO4, HNO3, H2O, Na2CO3
Chapter 12: Introduction to Acid and Base
Balbharati solutions for General Science 8th Standard Maharashtra State Board chapter 12 - Introduction to Acid and Base
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Concepts covered in General Science 8th Standard Maharashtra State Board chapter 12 Introduction to Acid and Base are Neutalization, Bases (Alkalis), Indicators, Acids, Acids, Acids.
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