NCERT Class 8 Science Curiosity (Sanskrit): Chapter 9 — अध्यायः ९ विलीयमानानां विलायकानां विलीनानाञ्च अद्भुतं जगत्
This chapter, 'The Wonderful World of Solutes, Solvents, and Solutions' from NCERT Class 8 Science Curiosity, explores the concepts of solutions and mixtures. It begins by posing questions about dissolving substances like sugar and salt in water, and why water is considered a good solvent. The chapter defines a solution as a homogeneous mixture where a solute dissolves in a solvent. It differentiates between homogeneous and heterogeneous mixtures, using examples like sugar in water versus sand or soil in water. The text explains that in a solution, the components are uniformly distributed. It also touches upon the role of water in oral rehydration solutions (ORS) and introduces the idea that even gases can form solutions, with air being a common example where nitrogen acts as the solvent.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 8 |
| Subject | Science |
| Book | Curiosity (Sanskrit) |
| Chapter | Chapter 9 — अध्यायः ९ विलीयमानानां विलायकानां विलीनानाञ्च अद्भुतं जगत् |
| Language | Sanskrit |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 2 minutes |
| Word count | 225 |
Learning outcomes
- Understand the difference between homogeneous and heterogeneous mixtures.
- Define and identify solutes, solvents, and solutions.
- Explain why water is a good solvent.
- Recognize that solutions can be formed by different states of matter.
Vocabulary
| Word | Meaning |
|---|---|
| द्रावणम् | Solution |
| विलेय | Solute |
| विलायक | Solvent |
| एकरूपम् | Homogeneous |
| एकरूपरहित | Heterogeneous |
| मिश्रणम् | Mixture |
| निर्जीलीकरणम् | Dehydration |
| चिकित्सा | Treatment |
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Practice questions
- What is a solution? Answer: A solution is a homogeneous mixture.
- Identify the solute and solvent in a sugar solution in water. Answer: Sugar is the solute, and water is the solvent.
- Give an example of a heterogeneous mixture. Answer: Sand mixed with water is a heterogeneous mixture.
- Why is water considered a good solvent? Answer: Water is considered a good solvent because many substances dissolve in it.
Frequently asked questions
What is the main topic of Chapter 9 in NCERT Class 8 Science Curiosity?
Chapter 9 discusses the wonderful world of solutes, solvents, and solutions, explaining mixtures and their properties.
What is the difference between a solute and a solvent?
In a solution, the component that dissolves is called the solute, and the component in which it dissolves is called the solvent.
Can gases form solutions?
Yes, gases can form solutions. Air is an example of a gaseous solution where nitrogen acts as the solvent.
What is an example of a homogeneous mixture mentioned in the chapter?
Salt or sugar dissolved in water is given as an example of a homogeneous mixture.
What is an example of a heterogeneous mixture?
Mixtures like sand or soil in water are examples of heterogeneous mixtures.
Related resources
Important topics
Topics covered
NCERT Class 8 Science — Curiosity (Sanskrit) — Chapter 9 — अध्यायः ९ विलीयमानानां विलायकानां विलीनानाञ्च अद्भुतं जगत्. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.