Class 9
Science
Chapter 5
Exploration (latest NCERT)
Exploring Mixtures and their Separation
Free NCERT practice questions for Class 9 Science, Chapter 5 — 91 questions across MCQs, short-answer, long-answer, numericals and more. Download a printable PDF worksheet in seconds. No signup, no ads, no paywall.
What this chapter covers
Class 9 Science Chapter 5 'Exploring Mixtures and their Separation' from NCERT Exploration develops the chemistry of pure substances and mixtures. Students learn the difference between homogeneous and heterogeneous mixtures, solubility and concentration (mass percentage, volume percentage), and the standard separation techniques: filtration, evaporation, distillation, fractional distillation, chromatography and centrifugation.
Key topics in this chapter
- Pure substances vs mixtures
- Homogeneous and heterogeneous mixtures
- Solubility and concentration
- Mass % and volume %
- Filtration, evaporation, distillation, chromatography
Sample questions from this chapter
Here are 6 real questions students will encounter when they generate a worksheet for this chapter. Every question includes the answer.
MCQ
Medium
1 mark
Which technique separates two immiscible liquids?
(a) Distillation
(b) Filtration
(c) Separating funnel
(d) Crystallization
Answer: Separating funnel
Short Answer
Medium
3 marks
Differentiate between a solution and a suspension.
Answer: • Solution: very small particles (<1 nm); transparent; does not settle.
• Suspension: large particles; settles down on standing; can be filtered.
Fill in the Blank
Medium
1 mark
Distillation needs a minimum boiling-point difference of about __________ °C.
Answer: 25
Numerical
Medium
3 marks
A cake mix has 75 g sugar, 420 g flour and 5 g sodium hydrogencarbonate. Find the mass percentage of each component.
Answer: • Total mass = 75 + 420 + 5 = 500 g.
• Sugar = 75/500×100 = 15% m/m.
• Flour = 420/500×100 = 84% m/m.
• NaHCO₃ = 5/500×100 = 1% m/m.
Very Short
Easy
1 mark
What is a homogeneous mixture?
Answer: A mixture with the same (uniform) composition throughout, e.g. salt solution.
True / False
Medium
1 mark
State True or False: A colloid settles down quickly when left undisturbed.
Answer: False. A colloid does not settle down; a suspension does.
Generate a worksheet with all 91 questions →
Frequently asked questions
What is included in Class 9 Science Chapter 5 (Exploring Mixtures and their Separation)?
This chapter has 91 NCERT-aligned practice questions covering all the concepts from the Exploration textbook's Chapter 5. Questions span easy, medium and hard levels across 10 different formats so students get a balanced practice set.
Are these questions based on the new NCERT Exploration textbook?
Yes. Every question on Practico for Class 9 Science is mapped directly to the latest NCERT Exploration textbook (the one CBSE schools are using now). The chapter numbers and chapter titles match the textbook exactly.
How many questions can I practice from this chapter?
91 questions are available right now. You can pick how many you want at a time — generate 10 quick MCQs, a 30-question worksheet, or a full exam-style mix. Each generation gives you a different random set.
Can I download a free PDF worksheet for Exploring Mixtures and their Separation?
Yes — completely free, no sign-up required. Pick this chapter, choose the number of questions and types you want, and download a printable PDF (with or without answers) in one click.
What question types are available?
This chapter has assertion reason, fill blank, image, long, match, mcq, numerical, short, true false, very short. You can mix any combination, or filter to just the type you want to practice — for example, only numericals to drill calculation, or only short-answer questions for exam revision.
Is Practico aligned with CBSE exam patterns?
Yes. Practico questions are tagged by marks (1, 2, 3, 5) and by difficulty (Easy/Medium/Hard) just like CBSE exam blueprints, so you can build a worksheet that mirrors a real unit test or annual exam.