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Important Questions

Exploring Mixtures and their Separation

CBSE · Class 9 · Science

Most important questions from Exploring Mixtures and their Separation for CBSE Class 9 Science board exam 2026. MCQs, short answer, and long answer questions with marks.

85 questions80 flashcards5 concepts

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85 Questions·
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Sample Questions

1multiple choice
3 marks

A saline drip contains 0.9% m/v sodium chloride. How many grams of sodium chloride are present in 750 mL of the solution?

Show answer

6.75 g

0.9% m/v means 0.9 g in 100 mL. For 750 mL, mass = (0.9/100) × 750 = 6.75 g.

2multiple choice
3 marks

A liquid pesticide spray is prepared by mixing 1 mL pesticide with water to make 100 mL solution. If 3 such sprays are made, what is the total volume of pesticide used?

Show answer

3 mL

Each 100 mL spray contains 1 mL pesticide. For 3 sprays, total pesticide used = 1 + 1 + 1 = 3 mL.

3multiple choice
3 marks

A sample of talcum powder contains 4% m/m zinc oxide. How much zinc oxide is present in 300 g of the powder?

Show answer

12 g

4% m/m means 4 g solute in 100 g solution. For 300 g powder, zinc oxide = (4/100) × 300 = 12 g.

4multiple choice
3 marks

A mixture of acetone and water is separated by distillation. If acetone boils at about 56°C and water boils at 100°C, what is the boiling point difference?

Show answer

44°C

Boiling point difference = 100°C - 56°C = 44°C. This is large enough for distillation.

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Frequently Asked Questions

What are the important topics in Exploring Mixtures and their Separation for CBSE Class 9 Science?
Key topics in Exploring Mixtures and their Separation include Correct vs Incorrect: What Happens to Cells in Different Solutions, Cell Structure - Complete Overview, The Fundamental Unit of Life — Complete Concept Map. These are the concepts CBSE Class 9 examiners draw on most — study them first, then practise related questions.
How to score full marks in Exploring Mixtures and their Separation — CBSE Class 9 Science?
Understand the core concepts first, then work through the 85 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Exploring Mixtures and their Separation?
There are 85 practice questions available for Exploring Mixtures and their Separation. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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