Matter in Our Surroundings (9 Science)
Matter is anything that has mass and occupies space, existing in three states: solid, liquid, and gas. Understanding the properties of matter and changes i
TL;DR: Matter is anything that has mass and occupies space, existing in three states: solid, liquid, and gas. Understanding the properties of matter and chan…
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Matter is anything that has mass and occupies space, existing in three states: solid, liquid, and gas. Understanding the properties of matter and changes i
Matter in Our Surroundings MCQs with Answers & Explanations
Q1. Which of the following is a property of solids?
- No definite shape or volume
- Definite shape and volume ✓ (correct)
- Takes the shape of container
- No intermolecular forces
Q2. The change of state from liquid to gas is called:
- Melting
- Freezing
- Evaporation ✓ (correct)
- Condensation
Q3. The temperature at which a solid melts into a liquid is:
- Boiling point
- Melting point ✓ (correct)
- Freezing point
- Critical point
Q4. Sublimation is the process where a substance changes from:
- Solid to liquid
- Liquid to gas
- Gas to solid
- Solid directly to gas ✓ (correct)
Q5. Which of the following shows the correct order of particles spacing?
- Solid > Liquid > Gas
- Gas > Solid > Liquid
- Gas > Liquid > Solid ✓ (correct)
- All are equal
Q6. The SI unit of temperature is:
- Celsius
- Fahrenheit
- Kelvin ✓ (correct)
- Rankine
Q7. Evaporation occurs at:
- Boiling point only
- Any temperature below boiling point ✓ (correct)
- Only at room temperature
- Only when heated
Q8. The process of conversion of gas to liquid is:
- Evaporation
- Condensation ✓ (correct)
- Deposition
- Melting
Q9. Which state of matter has particles that are closely packed and can vibrate?
- Gas
- Liquid
- Solid ✓ (correct)
- Plasma
Q10. The boiling point of water at standard atmospheric pressure is:
- 90 degrees C
- 100 degrees C ✓ (correct)
- 110 degrees C
- 50 degrees C
Frequently Asked Questions
Why do different substances have different melting and boiling points?
Different substances have different strengths of intermolecular forces, which determines the temperature needed to change states.
What causes evaporation even below the boiling point?
High-energy particles at the surface of a liquid gain enough energy to escape as gas molecules at room temperature.
More 9 Science MCQs
- Light Reflection and Refraction
- Electricity
- Acids Bases and Salts
- Life Processes
- Carbon and its Compounds
- Metals and Non-metals
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