Class 9 Practice Level 1 – Is Matter Around Us Pure? Leave a Comment / By anushka kumari / July 3, 2024 Class 9 Practice Level 1 – Is Matter Around Us Pure? Total questions: 40 1. What is an element? A mixture of different substances A pure substance that cannot be broken down into simpler substances A substance composed of two or more elements A homogeneous mixture None 2. Which of the following is an example of a compound? Oxygen Gold Water Nitrogen None 3. What is a mixture? A pure substance that be separated A combination of two or more substances that are chemically combined A combination of two or more substances that are not chemically combined A substance with a fixed composition None 4. Which of the following is a homogeneous mixture? Salad Salt water Sand and water Oil and water None 5. Which of the following is a heterogeneous mixture? Air Vinegar Salt water Salad None 6. What is a solution? A heterogeneous mixture A pure substance A homogeneous mixture of two or more substances A compound None 7. In a salt solution, what is the solute? Water Salt Sugar Alcohol None 8. Which of the following is an example of a colloid? Salt water Muddy water Milk Air None 9. Which method is used to separate a solid from a liquid in a heterogeneous mixture? Evaporation Filtration Distillation Chromatography None 10. Which separation technique is used to separate a mixture of two immiscible liquids? Filtration Decantation Evaporation Chromatography None 11. What is an alloy? A pure metal A mixture of two or more metals A compound of metals and non-metals A heterogeneous mixture None 12. Which of the following is an example of a mixture? Pure water Gold Air Hydrogen None 13. Which of the following is a homogeneous mixture? Oil and water Sand and water Vinegar Wood None 14. What type of mixture is a solution? Heterogeneous Homogeneous Colloid Suspension None 15. What is a suspension? A solution A homogeneous mixture A mixture where particles settle over time A compound None 16. Which of the following is an example of a colloid? Sugar solution Muddy water Blood Oxygen None 17. Which separation technique uses heat to separate a soluble solid from a liquid? Filtration Distillation Evaporation Decantation None 18. Which separation technique can separate components of a mixture based on boiling points? Filtration Distillation Evaporation Chromatography None 19. Which method is used to separate different pigments from an ink sample? Filtration Distillation Chromatography Evaporation None 20. What can filtration be used to separate? Two miscible liquids A soluble solid from a liquid A solid from a liquid Two immiscible liquids None 21. Which of the following is a pure substance? Salt solution Air Copper Vinegar None 22. Which of the following is not a homogeneous mixture? Brass Salt water Oil and water Air None 23. Which of the following is not a heterogeneous mixture? Salad Sand and water Sugar solution Granite None 24. Bronze is an alloy of: Copper and zinc Copper and tin Iron and carbon Aluminium and copper None 25. Which of the following is a solution? Milk Blood Sea water Muddy water None 26. Which of the following is not separated by filtration? Sand from water Tea leaves from tea Salt from saltwater Mud from water None 27. Evaporation can be used to separate: Iron filings from sand Salt from saltwater Pebbles from sand Mud from water None 28. Decantation can be used to separate: Oil and water Salt from water Sand from water Iron from sulphur None 29. Which of the following is not a pure substance? Gold Oxygen Water Air None 30. A mixture of alcohol and water is: A colloid A suspension A homogeneous mixture A heterogeneous mixture None 31. Which method is used to separate dyes in black ink? Filtration Chromatography Evaporation Distillation None 32. Which of the following is a characteristic of colloids? Particles settle on standing Particles are visible to the naked eye Particles scatter light Particles dissolve completely None 33. Which of the following is a characteristic of suspensions? Particles do not settle Particles are visible and settle on standing Particles are smaller than in solutions Particles form a uniform composition None 34. Distillation is used to separate components of a mixture based on: Colour Size Boiling points Density None 35. Which of the following increases the solubility of a solid in a liquid? Decreasing temperature Increasing temperature Increasing pressure Stirring None 36. What is retained on the filter paper in filtration? Solute Solvent Filtrate Residue None 37. What is the term for the substance that dissolves in a solvent? Solute Solution Solvent Colloid None 38. Which method separates a mixture by passing it through a medium where components move at different rates? Filtration Distillation Chromatography Evaporation None 39. Which of the following is more soluble in hot water than in cold water? Oxygen Nacl Sugar Kcl None 40. What is a pure substance? A mixture of different substances A material with a uniform and definite composition A substance with variable composition A combination of two or more elements None 1 out of 40 Time's up