This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 1 Matter In Our Surroundings – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 1 Matter In Our Surroundings Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Fusion is the process of change of A) Liquid into solid. B) Solid into liquid. C) Solid into gas. D) Gas into solid. Show Answer Correct Answer: B) Solid into liquid. 2. 0Celcius= ..... Kelvin A) 283.16. B) 273.61. C) 343.10. D) 273.16. Show Answer Correct Answer: D) 273.16. 3. The boiling points of diethyl ether, acetone and n-butyl alcohol are 35$^\circ$C, 56$^\circ$C and 118$^\circ$C respectively. Which one of the following correctly represents their boiling points in kelvin scale? A) 306 K, 329 K, 391 K. B) 308 K, 329 K, 392 K. C) 308 K, 329 K, 391 K. D) 329 K, 392 K, 308 K. Show Answer Correct Answer: C) 308 K, 329 K, 391 K. 4. What is the SI unit of mass of particle? A) GRAM. B) Milligrams. C) LITRE. D) KILOGRAM. Show Answer Correct Answer: D) KILOGRAM. 5. Which of the following cannot be considered a form of matter? A) Atom. B) Water. C) Cold. D) Electron. Show Answer Correct Answer: C) Cold. 6. The boiling point of water at higher altitude is A) 373 K. B) < 373 K. C) > 373 K. D) 273 K. Show Answer Correct Answer: B) < 373 K. 7. CO$_{2}$ can be easily liquified and even solidified because- A) It has weak forces of attraction. B) It has comparatively more force of attraction than other gases. C) It has more intermolecular space. D) It is present in atmosphere. Show Answer Correct Answer: B) It has comparatively more force of attraction than other gases. 8. When water gets solidified into ice, then heat is: A) Absorbed. B) Evolved. C) First absorbed then evolved. D) Initially evolved then absorbed. Show Answer Correct Answer: B) Evolved. 9. Which is known as dry ice. A) CO2. B) H2O. C) Fruit ice. D) Both a &b. Show Answer Correct Answer: A) CO2. 10. If we keep cold drink bottle in freezer, what will happen? A) Water will change into ice. B) Cold drink bottle will break. C) CO$_{2}$ gas will get solidified. D) Nothing happens. Show Answer Correct Answer: B) Cold drink bottle will break. 11. Which of the following is most suitable for summer? A) Cotton. B) Nylon. C) Polyester. D) Silk. Show Answer Correct Answer: A) Cotton. 12. Which of the following statements is true for evaporation A) Applying temperature and gas can liquify gases. B) Larger the surface area, greater the rate of evaporation. C) Reverse sublimation is the direct change of gases to solids. D) Non of the Above. Show Answer Correct Answer: B) Larger the surface area, greater the rate of evaporation. 13. The process of evaporation causes: A) Heating. B) Cooling. C) Increase in temperature. D) None of these. Show Answer Correct Answer: B) Cooling. 14. Which state of matter has a definite shape and a definite volume? A) Solids. B) Liquids. C) Gases. D) Plasma. Show Answer Correct Answer: A) Solids. 15. Calculate the density of the object of mass of 40g and having volume of 80 m$^{3}$. at 45$^\circ$C. Also Convert the given temperature into Fahrenheit scale. A) Density = 0.005 Kg/m$^{3}$ ; Temp. = 273 $^\circ$F. B) Density = 0.0005 Kg/m$^{3}$ ; Temp. = 113 $^\circ$F. C) Density = 0.05 Kg/m$^{3}$ ; Temp. = 273 $^\circ$F. D) Density = 0.005 Kg/m$^{3}$ ; Temp. = 113 $^\circ$F. Show Answer Correct Answer: B) Density = 0.0005 Kg/m$^{3}$ ; Temp. = 113 $^\circ$F. 16. Which of the following is not correct regarding gases? A) Gases exert pressure. B) Gases have large intermolecular spaces. C) Gases have weak tendency to diffuse. D) Gases have weak intermolecular forces ofattraction. Show Answer Correct Answer: C) Gases have weak tendency to diffuse. 17. On converting 25$^\circ$C, 38$^\circ$C and 66$^\circ$C to kelvin scale, the correct sequence of temperature will be A) 298 K, 311 K and 339 K. B) 298 K, 300 K and 338 K. C) 273 K, 278 K and 543 K. D) 298 K, 310 K and 338 K. Show Answer Correct Answer: A) 298 K, 311 K and 339 K. 18. When 2-3 crystals of copper sulphate is added to a glass of water, the colour developed is A) Blue. B) Green. C) Red. D) Yellow. Show Answer Correct Answer: A) Blue. 19. In which of the following conditions, the distance between the molecules of hydrogen gas would decrease? A) Increasing the pressure on hydrogen in a closed container. B) Increasing the volume of the container of hydrogen gas. C) Heating the container. D) Some hydrogen gas leaking out of container. Show Answer Correct Answer: A) Increasing the pressure on hydrogen in a closed container. 20. The 'panch tatva' or five basic elements are air, water, fire, earth and ..... ? A) Trees. B) Animals. C) Sky. D) Moon. Show Answer Correct Answer: C) Sky. 21. Select the one that is not matter A) Humidity. B) Feeling of heat. C) Water. D) Smoke. Show Answer Correct Answer: B) Feeling of heat. 22. -20 degree celsius is equal to A) 243K. B) I am. C) Cut. D) Your bottom. Show Answer Correct Answer: B) I am. 23. Which of the following statements is true about liquids? A) They have a fixed shape and volume. B) They have a fixed shape but not a fixed volume. C) They have a fixed volume but not a fixed shape. D) They do not have a fixed shape or volume. Show Answer Correct Answer: C) They have a fixed volume but not a fixed shape. 24. Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions A) Low temperature, low pressure. B) High temperature, low pressure. C) Low temperature, high pressure. D) Hight Temperature, high pressure. Show Answer Correct Answer: C) Low temperature, high pressure. 25. Factors on which evaporation depends A) Surface area. B) Temperature. C) Humidity. D) All of the above. 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