Class 8 Science — Chapter 9: The Amazing World of Solutes, Solvents and Solutions
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise the most important Class 8 Science questions from Chapter 9, "The Amazing World of Solutes, Solvents and Solutions" — 72 NCERT-aligned multiple-choice questions with answers and explanations. The set is split into 24 Easy, 24 Medium and 24 Hard, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams.
"The Amazing World of Solutes, Solvents and Solutions" is one of the chapters where concept clarity across physics, chemistry and biology basics really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+4 correct, −1 wrong, 0 skipped), training the same negative-marking accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on The Amazing World of Solutes, Solvents and Solutions, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 8 Science mastery score. A sample question is shown below; sign in free to see its answer and practise all 72.
Key concepts: The Amazing World of Solutes, Solvents and Solutions (Class 8 Science)
This chapter explores how substances dissolve and why things float or sink. When a solute dissolves in a solvent it forms a solution — a uniform mixture. Solubility is the maximum solute that dissolves in a fixed amount of solvent at a given temperature, and a solution is saturated when no more will dissolve. The solubility of most solids rises with temperature, while gases dissolve less as water warms, which matters for the dissolved oxygen that keeps aquatic life alive. The chapter also defines density (Density = Mass ÷ Volume) and uses it to explain that objects less dense than a liquid float, while denser ones sink.
- Solute, solvent, solution
- The solute is the substance that dissolves, the solvent is the liquid it dissolves in (present in the larger amount), and together they make a solution.
- Solubility
- The maximum amount of a solute that dissolves in a fixed quantity of solvent at a given temperature.
- Saturated and unsaturated
- A saturated solution can dissolve no more solute at that temperature; an unsaturated one can still dissolve more.
- Concentration
- How much solute is present in a solution; a dilute solution has little solute and a concentrated solution has a lot.
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If you keep adding salt to water until no more dissolves, you have made a:
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Start this chapter free →The Amazing World of Solutes, Solvents and Solutions — FAQs
What are the key concepts in Class 8 Science The Amazing World of Solutes, Solvents and Solutions?+
This chapter explores how substances dissolve and why things float or sink. When a solute dissolves in a solvent it forms a solution — a uniform mixture. Solubility is the maximum solute that dissolves in a fixed amount of solvent at a given temperature, and a solution is saturated when no more will dissolve. The solubility of most solids rises with temperature, while gases dissolve less as water warms, which matters for the dissolved oxygen that keeps aquatic life alive. The chapter also defines density (Density = Mass ÷ Volume) and uses it to explain that objects less dense than a liquid float, while denser ones sink. Key ideas include Solute, solvent, solution, Solubility, Saturated and unsaturated, Concentration.
What does Class 8 Science Chapter 9 (The Amazing World of Solutes, Solvents and Solutions) cover on XamBaaz?+
It covers 72 NCERT-aligned MCQs on "The Amazing World of Solutes, Solvents and Solutions" — 24 Easy, 24 Medium and 24 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams.
Are these "The Amazing World of Solutes, Solvents and Solutions" questions free to practise?+
Yes — sign in with Google to practise "The Amazing World of Solutes, Solvents and Solutions" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "The Amazing World of Solutes, Solvents and Solutions" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Are these "The Amazing World of Solutes, Solvents and Solutions" MCQs available with answers?+
Yes. This page shows one sample question so you can see the format; sign in free with Google to reveal the correct option and a step-by-step "Why" explanation for it, then practise all 72 questions with instant scoring.
Is there negative marking in the "The Amazing World of Solutes, Solvents and Solutions" quizzes?+
Yes — the timed quizzes use exam-grade marking: +4 for a correct answer, −1 for a wrong one and 0 for a skipped question, so you practise the same negative-marking discipline as CBSE Board exams.
Are these important questions for The Amazing World of Solutes, Solvents and Solutions?+
The set is curated to the NCERT syllabus and weighted toward the question patterns that actually appear in CBSE Board exams, across Easy, Medium and Hard — so it doubles as an "important questions" revision list for "The Amazing World of Solutes, Solvents and Solutions".