This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 2 Is Matter Around Us Pure – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Tyndall effect is observed in forests because of A) Tress. B) High oxygen level. C) Mist and dust particles in the air. D) Less sunlight. Show Answer Correct Answer: C) Mist and dust particles in the air. 2. WHAT IS THE SOLID CONTENT IN "TINCTURE OF IODINE" A) IODINE. B) ALCOHOL. C) SOLID CARBON-DIOXIDE. D) SOLID SOL. Show Answer Correct Answer: A) IODINE. 3. A mixture has two miscible liquids A and B. The boiling point of liquid A is 100 K and liquid B is 135 K. If you want to separate these, which separating method would you use? A) Sublimation. B) Filtration. C) Simple distillation. D) Fractional distillation. Show Answer Correct Answer: C) Simple distillation. 4. A solution contains 400 g of common salt in 3200 g of water. Calculate the concentration of salt in this solution in terms of mass percentage? A) 11.11%. B) 1.11%. C) 111.1%. D) 1.1%. Show Answer Correct Answer: A) 11.11%. 5. As air temperature increases, air can hold more water molecules, and its relative humidity decreases. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. A pure substance that cannot be broken down into other substances by chemical or physical means. A) Compound. B) Atom. C) Mixture. D) Element. Show Answer Correct Answer: D) Element. 7. Two substances A and B when bought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. the substance C is: A) A compound. B) An element. C) A mixture. D) None of the above. Show Answer Correct Answer: C) A mixture. 8. A component present in lesser quantity in solution called ..... A) Solute. B) Sugar. C) Solvent. D) Mixture. Show Answer Correct Answer: A) Solute. 9. Tincture of iodine is made by dissolving 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. 10. ..... is the homogenous mixture of 2 or more substances A) Colloid. B) Tyndall Effect. C) Solution. D) Centrifugation. Show Answer Correct Answer: C) Solution. 11. I AM A COLLOID, NO ONE CAN SEE ME WITH A NAKED EYEI MAKE LIGHT VISIBLE WHEN IT PASSES THROUGH ME, BUT WHY?A SCIENTIST HAS FOUND A PROPERTY IN ME IT SEEMS IS ALSO HAPPENS WITH A TREEWHO AM I? A) SOLUTION. B) SUSPENSION. C) COMPOUND. D) COLLOID. Show Answer Correct Answer: D) COLLOID. 12. Tyndall effect is shown by A) Only solution. B) Only suspension. C) Only colloids. D) Both suspenion and colloids. E) Both suspension and true solution. Show Answer Correct Answer: D) Both suspenion and colloids. 13. By which process is the mixture of ammonium chloride and sand separated? A) Winowing. B) Centrifugation. C) Sublimation. D) Evaporation. Show Answer Correct Answer: C) Sublimation. 14. The component of solution which is being dissolved in the other component is called ..... A) Solute. B) Solvent. C) Solubility. D) Concentration. Show Answer Correct Answer: A) Solute. 15. When is fractional distillation used for separating two miscible liquids? A) -25 K. B) More than 25 K. C) Less than 25 K. D) Equal to 25 K. Show Answer Correct Answer: C) Less than 25 K. 16. A blue iris in an eye is blue due to A) Brownian Motion. B) Tyndall Effect. C) Electrophoresis. D) Centrifugation. Show Answer Correct Answer: B) Tyndall Effect. 17. Substance with atoms that are all alike. A) Element. B) Compound. C) Homogeneous mixture. D) Heterogeneous mixture. Show Answer Correct Answer: A) Element. 18. WHAT DID RBERT BOYLE DO? A) ELEMENT. B) COMPOUND. C) METAL. D) MALLEABILITY. Show Answer Correct Answer: A) ELEMENT. 19. What wood be matter A) A table. B) Apple. C) You. D) All of the above. Show Answer Correct Answer: D) All of the above. 20. Q-6 How many types of Colloidal Solutions are there? A) 2. B) 4. C) 7. D) 8. E) 10. Show Answer Correct Answer: D) 8. 21. Dissolved Sodium chloride can be separated from salt solution by A) Chemical process of extraction. B) Physical process of evaporation. C) Chemical processes. D) None of the above. Show Answer Correct Answer: B) Physical process of evaporation. 22. .A student is given a mixture of iron filings and sulphur in thee ratio 1:2 by weight. He was then asked to heat the mixture over a flame and to observe the olor change. The student will observe that the mixture becomes: A) Black. B) Grey. C) Yellow. D) Orange. Show Answer Correct Answer: A) Black. 23. Concentration of 36g of NaCl in 100 g of water is A) 23%. B) 26.47%. C) 29.32%. D) 21.11%. Show Answer Correct Answer: B) 26.47%. 24. What is the difference between a pure substance and a mixture? A) A pure substance can be separated into two or more substances, while a mixture cannot. B) A pure substance cannot be separated into two or more substances, while a mixture can. C) A pure substance has a fixed composition, while a mixture does not. D) A pure substance has a variable composition, while a mixture has a fixed composition. Show Answer Correct Answer: A) A pure substance can be separated into two or more substances, while a mixture cannot. 25. Colloids can be seperated by A) Filtration. B) Distillation. C) Sedimentation. D) Centrifugation. Show Answer Correct Answer: D) Centrifugation. ← 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