CBSE Class 9 Science Chapter 1 “Matter in Our Surroundings” Multiple Choice Questions with Answers
Matter in Our Surroundings MCQ – Here is a compilation of Free MCQs of Class 9 Science Book Chapter 1 Matter in Our Surroundings with Answers. Students can practice free MCQs as have been added by CBSE in the new Exam pattern. At the end of Multiple Choice Questions, the answer key also has been provided for your reference.
Q.1. Which is not a common characteristic property of matter?
(a) The molecules possess kinetic energy
(b) The molecules occupy certain volume
(c) The molecules are rigid and have fixed positions
(d) The molecules vibrate between the mean positions
Q.2. Which of the following gases can be liquefied when pressure is applied at room temperature?
(a) Oxygen
(b) Ammonia
(c) Hydrogen
(d) Nitrogen
Q.3. In which of the following substances the molecules possess maximum kinetic energy under normal conditions?
(a) Sugar
(b) Sulphur powder
(c) Ammonium Chloride
(d) Common Salt
Q.4. When common salt is added to water, its boiling point increases by 20℃. What would be the boiling point of that salt water in Kelvin scale?
(a) 393 K
(b) 273 K
(c) 373 K
(d) 120 K
Q.5. Substances which occupy the entire space in the container under normal conditions is _______
(i) Ammonia
(ii) Bromine
(iii) Iodine
(iv) Chlorine
(a) i, ii, iv
(b) ii, iii
(c) iii only
(d) i, iv
Q.6. The boiling point of alcohol is 78℃ and its freezing point is – 114℃. At what temperature does alcohol undergo evaporation?
(a) 124 K
(b) 159K
(c) 321 K
(d) 373 K
Q.7. Identify amorphous solid among the following.
(a) Charcoal
(b) Alum
(c) Common salt
(d) Graphite
Q.8. What is the phenomenon involved in a lawn becoming wet in the morning during winter?
(a) Vaporisation
(b) Liquefaction
(c) Condensation
(d) Deposition
Q.9. Which of the following statements is correct?
Statement I: An iron rod undergoes expansion on heating.
Statement Il: Solids show maximum thermal expansion.
(a) Only statement I is correct
(b) Only statement Il is correct
(c) Both the statements are correct
(d) Neither statement I nor statement Il is correct
Q.10. Identify the water temperature which gets cooled at the maximum rate?
(a) Water at 100℃
(b) Water at 80℃
(c) Water at 70℃
(d) Water at 50℃
Q.11. A solid having a melting point of 325℃ is subjected to heating. Which Statement is true which comply with this Solid?
(i) The kinetic energy of the molecules increases continuously till the liquid state at 598 K is obtained.
(ii) The solid melts if it is heated up to 598 K and stopped.
(iii) The molecules of molten solid possess greater amounts of energy than the solid at the same temperature.
(iv) Heating the solid at room temperature supplies latent heat of fusion for the solid to undergo melting.
(a) i, ii, iii and iv
(b) iii, iv
(c) i, iv
(d) iii only
Q.12. Which substance has the most ordered arrangement of molecules under normal conditions?
(a) Chlorine
(b) Mercury
(c) Gold
(d) Bromine
Q.13. Gases do not have __________.
(a) high compressibility
(b) large volume
(c) high fluidity
(d) high density
Q.14. A solid is subjected to heating. The molecules formed were immediately diffused into air. It concludes that
(a) the solid has maximum forces of attraction between the molecules.
(b) the melting point of the solid is close to room temperature.
(c) the solid is a sublimable substance.
(d) the substance obtained has molecules which possess only vibratory motion.
Q.15. Which is an application of Boyle’s law?
(a) Pool floats used in swimming
(b) Increase in tyre pressure after a long journey
(c) Usage of Bicycle pump
(d) Puffing of bread during baking.
Answer Key for Class 9 Science Chapter 1 Matter in Our Surroundings MCQs
| Q. | Ans | Q. | Ans |
| 1 | (c) | 9 | (a) |
| 2 | (b) | 10 | (a) |
| 3 | (c) | 11 | (d) |
| 4 | (a) | 12 | (a) |
| 5 | (d) | 13 | (b) |
| 6 | (a) | 14 | (c) |
| 7 | (a) | 15 | (c) |
| 8 | (c) |
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