This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 2 Is Matter Around Us Pure – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Mixture of sulphur and carbon disulphide is A) Heterogeneous and shows Tyndall effect. B) Homogeneous and shows Tyndall effect. C) Heterogeneous and does not show Tyndall effect. D) Homogeneous and does not show Tyndall effect. Show Answer Correct Answer: D) Homogeneous and does not show Tyndall effect. 2. Centrifugation technique can only work on: A) Homogeneous mixture. B) Heterogeneous mixture. C) All the above. D) None of the above. Show Answer Correct Answer: B) Heterogeneous mixture. 3. What are the boiling points of Alcohol and Water? A) Alcohol = 79C, Water = 100C. B) Alcohol = 78C, Water = 200C. C) Alcohol = 79C, Water = 200C. D) Alcohol = 78C, Water = 100C. Show Answer Correct Answer: D) Alcohol = 78C, Water = 100C. 4. Which of the following statements are true for pure substances?(i) Pure substances contain only one kind of particles(ii) Pure substances may be compounds or mixtures(iii) Pure substances have the same composition throughout(iv) Pure substances can be exemplified by all elements other than nickel A) (i) and (ii). B) (i) and (iii). C) (iii) and (iv). D) (ii) and (iii). Show Answer Correct Answer: B) (i) and (iii). 5. A mixture of salt in water does not allow light to scatter when passed through it. It is a ..... A) Solution. B) Colloid. C) Pure substance. D) Suspension. Show Answer Correct Answer: A) Solution. 6. Name the process associated when dry ice is kept at room temperature and at one atmospheric pressure. A) Centrifugation. B) Sedimentation. C) Sublimation. D) Dissolution. E) Evaporation. Show Answer Correct Answer: C) Sublimation. 7. Mixtures of two or more metals, or metals and non-metals are ..... A) Alloys. B) Mixtures. C) Metallic mixture. D) None of the above. Show Answer Correct Answer: A) Alloys. 8. What is the opposite of 'pure' in Chemistry? A) Homogeneous. B) Heterogeneous. C) Elementary. D) Compound. Show Answer Correct Answer: B) Heterogeneous. 9. Type of mixture that doesn't separate on its own but still contains undissolved particles A) Solution. B) Colloid. C) Suspension. D) None of the above. Show Answer Correct Answer: B) Colloid. 10. Purity of a solid substance can be checked by its: A) Boiling point. B) Melting point. C) Solubility in water. D) Solubility in alcohol. Show Answer Correct Answer: B) Melting point. 11. A solution for making tea contains 20 g of sugar in 150 ml of water. Find the concentration of solution. A) 12.5%. B) 14%. C) 14.3%. D) 13.3%. Show Answer Correct Answer: D) 13.3%. 12. Alum is generally used in which of the following separating technique? A) Chromatography. B) Loading. C) Centrifugation. D) Fractional distillation. Show Answer Correct Answer: B) Loading. 13. Sugar water is a A) Solution. B) Suspension. C) Colloid. D) None of the above. Show Answer Correct Answer: A) Solution. 14. Suspended particlers cannot be seen by naked eyes. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 15. In air, ..... Is a solvent. A) Nitrogen. B) Oxygen. C) Argon. D) None of the above. Show Answer Correct Answer: A) Nitrogen. 16. Tincture of iodine has antiseptic properties. This solution is made bydissolving A) Iodine in potassium iodide. B) Iodine in vaseline. C) Iodine in water. D) Iodine in alcohol. Show Answer Correct Answer: D) Iodine in alcohol. 17. Which of the following is not a compound? A) Ozone. B) Graphite. C) Nitrogen. D) All of these. Show Answer Correct Answer: D) All of these. 18. What are the 2 components of a colloid? A) Dispersed phase and dispersion medium. B) Dispersed phase and solvent. C) Solute and Solvent. D) Solute and dispersion medium. Show Answer Correct Answer: A) Dispersed phase and dispersion medium. 19. Dissolved sodium chloride can be separated from water by ..... A) Physical process. B) Chemical process. C) Physical process of evaporation. D) Chemical process of extraction. Show Answer Correct Answer: C) Physical process of evaporation. 20. Which of the following mixtures will be the most difficult to separate? A) Iron filings + sand. B) Sand + water. C) Sawdust + stones. D) Nitrogen + hydrogen. Show Answer Correct Answer: D) Nitrogen + hydrogen. 21. According to the definition of pure substance, which of the following is a pure substance? A) Ice. B) Mercury. C) Iron. D) All of these. Show Answer Correct Answer: D) All of these. 22. WHAT IS THE PERCENTAGE OF COMPOSITION OF O$_{2 }$+ N$_{2}$ A) 97%. B) 93%. C) 96%. D) 99%. Show Answer Correct Answer: D) 99%. 23. The solution of copper sulphate do not show tyndall effect. It means it is a type of ..... A) Colloid. B) Solution. C) Suspension. D) Concentration. Show Answer Correct Answer: B) Solution. 24. Which of the following provides an example of a true solution? A) Blood. B) Milk. C) Sugar solution. D) Starch solution. Show Answer Correct Answer: C) Sugar solution. 25. Which of the following is considered to be a pure substance? A) Granite. B) Sodium chloride. C) Muddy water. D) Milk of magnesia. Show Answer Correct Answer: B) Sodium chloride. ← PreviousNext →Related QuizzesClass 9 Science Chapter 2 Is Matter Around Us Pure Quiz 1Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 2Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 3Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 4Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 5Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 6Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 7Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 8Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 9Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books