This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 2 Is Matter Around Us Pure – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A solution contains 50 g common salt in 200g of water. Calculate the concentration of the solution. A) 14.5%. B) 16.6%. C) 20%. D) 25%. Show Answer Correct Answer: C) 20%. 2. A mixture that is evenly distributed is called ..... A) Heterozygous. B) Heterogenous. C) Homogenous. D) Periodic. Show Answer Correct Answer: C) Homogenous. 3. The size of the particle of solute is ..... for colloidal Solution A) <1nm. B) > 1nm. C) Between 1nm and 100nm. D) Above 100 nm. Show Answer Correct Answer: C) Between 1nm and 100nm. 4. Particles size in colloids range from A) 1nm-100nm. B) 10nm-1000nm. C) 1nm-1000nm. D) 50nm-5000nm. Show Answer Correct Answer: C) 1nm-1000nm. 5. Homogeneous solutionmay separated by ..... A) Chemical process. B) Physical process. C) Filtration. D) Evaporation. Show Answer Correct Answer: A) Chemical process. 6. Elements such as gallium and cesium become liquid at a room temprature of ..... A) 303 K. B) 300 K. C) 330 K. D) 304 K. Show Answer Correct Answer: A) 303 K. 7. If the particles of a mixture can be seen by naked eyes, it is ..... A) Solution. B) Suspension. C) Colloid. D) Compound. Show Answer Correct Answer: B) Suspension. 8. What is carbon dioxide A) Solid. B) Liquid. C) Gas. D) Don't know. Show Answer Correct Answer: C) Gas. 9. A homogeneous mixture of two or more substance A) Mixture. B) Heterogeneous solution. C) Solution. D) Sols. Show Answer Correct Answer: C) Solution. 10. Which of the following will have same type of particles? A) Milk. B) Polluted Air. C) Iron. D) Clean air. Show Answer Correct Answer: C) Iron. 11. What is an Emulsion? A) Colloid fromed when Solid is mixed in liquid. B) Colloid fromed when Liquid is mixed in gas. C) Colloid fromed when Liquid is mixed in liquid. D) Colloid fromed when Gas is mixed in gas. Show Answer Correct Answer: C) Colloid fromed when Liquid is mixed in liquid. 12. What does the term 'matter around us' refer to in Chemistry? A) The behavior of particles in a vacuum. B) Substances that can be touched, seen, and felt. C) The study of quantum mechanics. D) The properties of elements. Show Answer Correct Answer: B) Substances that can be touched, seen, and felt. 13. Which one of the following scrap metal cannot be separated by magnetic separation? A) Cobalt. B) Nickel. C) Chromium. D) Steel. Show Answer Correct Answer: D) Steel. 14. A mixture of chalk powder in water is an example of ..... A) Solution. B) Suspension. C) Colloid. D) Brownian motion. Show Answer Correct Answer: B) Suspension. 15. What is an example of a pure substance? A) Saltwater. B) Iron. C) Oxygen gas. D) Copper wire. Show Answer Correct Answer: B) Iron. 16. Which of the following are homogeneous in nature? A) Ice. B) Wood. C) Sugar and sand. D) Concrete. Show Answer Correct Answer: A) Ice. 17. Centrifugation technique is mostly preferred for: A) Solutions. B) Colloids. C) Suspensions. D) All the above. Show Answer Correct Answer: B) Colloids. 18. Air is regarded as a mixture because ..... (two or more options might be correct) A) Its pressure may vary. B) Its temperature may change. C) Its composition may vary. D) Its volume changes under different conditions. Show Answer Correct Answer: C) Its composition may vary. 19. The solubility of a salt in water is 20g/100g at 25C. It increases 10% for every 5C rise of temperature upto 50C and then becomes constant. A solution of 26g of the same salt in 100g of water at 35C would be A) Saturated. B) Unsaturated. C) Translucent. D) Colloidal. Show Answer Correct Answer: A) Saturated. 20. Boron and carbon are A) Metalloids. B) Metalloid and non-metal respectively. C) Metal. D) Non-metal and metalloid respectively. Show Answer Correct Answer: B) Metalloid and non-metal respectively. 21. In which of the following is Tyndall effect seen? A) Solution of common salt. B) Milk. C) Lemon juice. D) Solution of copper sulphate (blue vitrol). Show Answer Correct Answer: B) Milk. 22. In ..... The path of light is not visible. A) Solution. B) Colloid. C) Suspension. D) None of the above. Show Answer Correct Answer: A) Solution. 23. The name of scientist who discovered Brownian motion is ..... A) Robert Boyle. B) Robert Brown. C) Robert Hook. D) Antoine Lavoisier. Show Answer Correct Answer: B) Robert Brown. 24. What was chromatography used for at the initial stage? A) For coloring on dress. B) For separation of colors. C) For dilution of colors. D) None of the above. Show Answer Correct Answer: B) For separation of colors. 25. ASSERTION:CRYSTALLISATION IS USED TO EXTRACT SALT FROM SEA WATER.REASON:EVAPORATION MAY GET SOME SOLID CHARRED A) ASSERTION (A) AND REASON (R) ARE CORRECT AND REASON (R) IS THE CORRECT EXPLANATION OF ASSERTION (A). B) ASSERTION (A) AND REASON (R) ARE CORRECT AND REASON (R) IS NOT THE CORRECT EXPLANATION OF ASSERTION (A). C) ASSERTION (A) IS TRUE AND REASON (R) IS FALSE. D) ASSERTION (A) IS FALSE REASON (R) IS TRUE. Show Answer Correct Answer: A) ASSERTION (A) AND REASON (R) ARE CORRECT AND REASON (R) IS THE CORRECT EXPLANATION OF ASSERTION (A). ← 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 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