Matter in Our Surroundings Class 9 MCQs with Answers & Explanations
Matter in Our Surroundings Class 9 MCQs with Answers & Explanations
Class: 9 |
Subject: Science |
Section: Chemistry |
Topic: Matter in Our Surroundings
Based on: CBSE Board Examinations (NCERT Syllabus)
Based on: CBSE Board Examinations (NCERT Syllabus)
These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 9 Science examination preparation.
1. Matter is anything that has:
Answer: C
Explanation: Matter is defined as anything that has mass and occupies space. Both properties are essential.
Explanation: Matter is defined as anything that has mass and occupies space. Both properties are essential.
2. Which state of matter has a fixed shape?
Answer: C
Explanation: Solids have tightly packed particles, giving them definite shape and volume.
Explanation: Solids have tightly packed particles, giving them definite shape and volume.
3. Diffusion is fastest in:
Answer: C
Explanation: Gas particles move freely with high kinetic energy, so diffusion is fastest.
Explanation: Gas particles move freely with high kinetic energy, so diffusion is fastest.
4. SI unit of temperature is:
Answer: B
Explanation: Kelvin is the SI unit used in scientific measurements.
Explanation: Kelvin is the SI unit used in scientific measurements.
5. 0°C equals:
Answer: A
Explanation: Kelvin = °C + 273 → 0 + 273 = 273 K.
Explanation: Kelvin = °C + 273 → 0 + 273 = 273 K.
6. Melting of ice is a:
Answer: B
Explanation: Only state changes; no new substance forms.
Explanation: Only state changes; no new substance forms.
7. Boiling point of water is:
Answer: B
Explanation: At 1 atm pressure, water boils at 100°C.
Explanation: At 1 atm pressure, water boils at 100°C.
8. Latent heat is heat required to:
Answer: B
Explanation: It changes state without temperature change.
Explanation: It changes state without temperature change.
9. Sublimation is:
Answer: C
Explanation: Example: Camphor, naphthalene.
Explanation: Example: Camphor, naphthalene.
10. Compressibility is highest in:
Answer: C
Explanation: Large intermolecular spaces allow compression.
Explanation: Large intermolecular spaces allow compression.
11. Evaporation occurs at:
Answer: B — Surface phenomenon at all temperatures.
12. Cooling by evaporation is due to:
Answer: B — High-energy particles escape.
13. Plasma is:
Answer: B — Found in stars, lightning.
14. Condensation is:
Answer: A — Reverse of evaporation.
15. Dry ice is:
Answer: B — Sublimes directly.
16. Increase in temperature causes particles to:
Answer: B — Kinetic energy increases.
17. Intermolecular force is strongest in:
Answer: C — Particles tightly packed.
18. Liquid particles:
Answer: B — Slide past each other.
19. Boiling is a:
Answer: B — Occurs throughout liquid.
20. Matter exists in how many common states?
Answer: C — Solid, Liquid, Gas.