This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 2 Is Matter Around Us Pure – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A mixture of sulphur and carbon disulphide forms a homogeneous solution. What do we conclude from this statement? A) Sulphur is soluble in carbon disulphide. B) Sulphur is not soluble in carbon disulphide. C) All the above. D) None of the above. Show Answer Correct Answer: A) Sulphur is soluble in carbon disulphide. 2. Which of the following techniques is used in diagnostic lab for blood and urine test: A) Sublimation. B) Crystallization. C) Centrifugation. D) Evaporation. Show Answer Correct Answer: C) Centrifugation. 3. Water and alcohol are easily separated by distillation because of their A) Different densities. B) Different boiling points. C) Different colours. D) Different melting points. Show Answer Correct Answer: B) Different boiling points. 4. Filtration as a method of separation can be used for mixtures that are A) Homogeneous and liquid-in-gas mixtures. B) Heterogeneous and liquid-in-liquid mixtures. C) Homogeneous and solid-in-liquid mixtures. D) Heterogeneous and solid-in-liquid mixtures. Show Answer Correct Answer: D) Heterogeneous and solid-in-liquid mixtures. 5. Which of the following statements are true for pure substances?a)Pure substance contain only one kind of particles always.b)Pure substance may be compounds or mixturesc)Pure substance have the same composition throughoutd) compounds are also pure substances A) Option A is correct. B) Option B is correct. C) Both C and D are correct. D) Only D is correct. Show Answer Correct Answer: C) Both C and D are correct. 6. If a substance consists of only one type of atom, what is it classified as? A) Element. B) Compound. C) Mixture. D) Solution. Show Answer Correct Answer: A) Element. 7. Which of the following is an example of a solid-in-gas mixture? A) Soil. B) Smoke. C) Moisture. D) Dew. Show Answer Correct Answer: B) Smoke. 8. When two liquids do not mix, they form two separate layers and are known as A) Miscible liquids. B) Immiscible liquids. C) Saturated liquids. D) Super saturated liquids. Show Answer Correct Answer: B) Immiscible liquids. 9. Which method do we use to separate two miscible liquids? A) Centrifugation. B) Evaporation. C) Distillation. D) Separating Funnel. Show Answer Correct Answer: C) Distillation. 10. What is the dispersion phase and medium of milk? A) Liquid and Solid,. B) Solid and Liquid. C) Liquid and liquid. D) Gas and solid. Show Answer Correct Answer: C) Liquid and liquid. 11. What happens to the solubility of most solutes as the temperature increases? A) Increases. B) Decreases. C) Stays the same. D) Can't predict. Show Answer Correct Answer: A) Increases. 12. Rusting of an article made up of iron is called A) Corrosion and it is a physical as well as chemical change. B) Dissolution and it is a physical change. C) Corrosion and it is a chemical change. D) Dissolution and it is a chemical change. Show Answer Correct Answer: C) Corrosion and it is a chemical change. 13. 15 % of alcohol solution means A) 15ml alcohol and 85 ml water. B) 15 ml alcohol and 100 ml of water. C) 15ml of water and 85 ml alcohol. D) None of these. Show Answer Correct Answer: A) 15ml alcohol and 85 ml water. 14. Which of the following is false about suspension A) Show tyndall effect. B) Settle down after some time. C) Is homogeneous. D) Its particles can be separated using filtration. Show Answer Correct Answer: C) Is homogeneous. 15. Milk is an example of ..... A) Solution. B) Colloid. C) Pure substance. D) Suspension. Show Answer Correct Answer: B) Colloid. 16. WE ALL KNOW THAT THERE ARE MANY SECTORS IN PRODUCTIONS ALL OVER THE WORLD IN WHICH A SINGLE OR COUPLE OF COMPONENTS OF AIR ARE REQUIRED AND REST AREN'T SO THE COMPONENTS OF AIR ARE SEPERATED SO, CHOOSE THE OPTION THAT SHOWS THE CORRECT ORDER OF INCREASING BOILING POINT A) NITROGEN = OXYGEN > ARGON. B) ARGON = OXYGEN < NITROGEN. C) NITROGEN < ARGON < OXYGEN. D) OXYGEN < NITROGEN < ARGON. Show Answer Correct Answer: C) NITROGEN < ARGON < OXYGEN. 17. Q-2 What is the composition of BRASS? A) 50% zinc & 50% copper. B) 70% zinc & 30% copper. C) 40% zinc & 60% copper. D) 30% zinc & 70% copper. E) !!NON OF THE ABOVE!!. Show Answer Correct Answer: D) 30% zinc & 70% copper. 18. A solution of 200g contains 50g of solute. Calculate the (i) mass of the solvent and (ii) concentration mass by mass% of the solution. A) (i) Mass of the Solvent = 150g (ii) Mass by Mass% = 33.33%. B) (i) Mass of the Solvent = 250g (ii) Mass by Mass% = 25%. C) (i) Mass of the Solvent = 250g (ii) Mass by Mass% = 33.33%. D) (i) Mass of the Solvent = 150g (ii) Mass by Mass% = 25%. Show Answer Correct Answer: C) (i) Mass of the Solvent = 250g (ii) Mass by Mass% = 33.33%. 19. Different methods of separation is used to separate ..... A) Homogeneous Mixtures. B) Mixtures. C) Solutions. D) Heterogeneous Mixtures. Show Answer Correct Answer: B) Mixtures. 20. If we put camphor in an open container, its amount keeps on decreasing due to the phenomenon of A) Evaporation. B) Precipitation. C) Condensation. D) Sublimation. Show Answer Correct Answer: D) Sublimation. 21. How many H atoms are in H$_{2}$O? A) 1. B) 2. C) All the above. D) None of the above. Show Answer Correct Answer: B) 2. 22. A student is preparing solutions for a laboratory experiment by dissolving solid solutes in liquid solvents. Which action will increase the rate of solubility A) Lowering the temperature of the solvent. B) Stirring the solute in the solution. C) Increasing the pressure on the solution. D) Increasing the particle size of the solute. Show Answer Correct Answer: B) Stirring the solute in the solution. 23. Which of the following materials fall in the category of a "pure substance" ? Ice, Milk, Iron, Hydrochloric Acid, Mercury, Brick, Wood, Air A) Mercury, Brick, Wood, Air. B) Ice, Milk, Wood, Air. C) Ice, Iron, Hydrochloric Acid, Mercury,. D) Ice, Milk, Iron, Brick. Show Answer Correct Answer: C) Ice, Iron, Hydrochloric Acid, Mercury,. 24. In tincture of iodine, find the solute and solvent? A) Alcohol is the solute and iodine is the solvent. B) Iodine is the solute and alcohol is the solvent. C) Any component can be considered as solute or solvent. D) Tincture of iodine is not a solution. Show Answer Correct Answer: B) Iodine is the solute and alcohol is the solvent. 25. Which of the following is an Aerosol?(two or more options might be correct) A) Fog. B) Foam. C) Shaving Cream. D) Rubber. Show Answer Correct Answer: A) Fog. ← 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 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 10Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books