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Class 8 Science Chapter 9: The Amazing World of Solutes, Solvents, and Solutions — practice questions with answers

Free practice for Class 8 Science, Chapter 9: The Amazing World of Solutes, Solvents, and Solutions. Try the solved questions below, then take a free test with instant marking and explanations.

49 questions16 easy, 27 medium, 6 hardNCERT · CBSE · State boards
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Sample questions with solutions

Q1. Why does every sip of homemade ORS taste the same?
  1. Sugar and salt are evenly distributed throughout — it is a uniform mixture
  2. It is stirred before every sip
  3. Salt and sugar cancel out
  4. It is a non-uniform mixture
Show answer
Answer: A. Sugar and salt are evenly distributed throughout — it is a uniform mixture
Why: A uniform mixture is a solution. [p.135]
Q2. A uniform mixture of two or more substances is called a ______.
Show answer
Answer: solution
Why: ORS is a solution. [p.135, p.149]
Q3. In a solution of salt in water, which is the solvent?
  1. Water
  2. Salt
  3. Both
  4. Neither
Show answer
Answer: A. Water
Why: The solid dissolved is the solute. [p.149]
Q4. A solution in which no more solute can dissolve at a given temperature is called a ______ solution.
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Answer: saturated
Why: Undissolved solute settles at the bottom. [p.137]
Q5. A solution in which more solute can still be dissolved is called ______.
  1. unsaturated
  2. saturated
  3. concentrated only
  4. mixture
Show answer
Answer: A. unsaturated
Why: Activity 9.1. [p.137]
Q6. Mass per unit volume of a substance is called its ______.
Show answer
Answer: density
Why: Density = mass ÷ volume. [p.140]

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Frequently asked questions

How many practice questions are there for Class 8 Science Chapter 9: The Amazing World of Solutes, Solvents, and Solutions?

49 questions (16 easy, 27 medium, 6 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.

Is this chapter from the NCERT book?

Yes — it follows the NCERT Class 8 Science syllabus, used by CBSE and many state boards.

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