MCQ questions for class 9 Science Chapter 1 Matter in Our Surroundings
Question 1: Which of the following is not a characteristic of matter?
Occupies space
Has mass
Cannot be touched
Can be sensed
Question 2: The process of change of a substance directly from a solid to a gas is called:
Condensation
Evaporation
Sublimation
Melting
Question 3: Which of the following has the highest kinetic energy?
Gas
Liquid
Solid
Plasma
Question 4: The particles of matter are in constant motion. This motion increases with:
Decrease in temperature
Increase in temperature
No effect on temperature
Change in pressure
Question 5: Which state of matter has a definite shape and volume?
Solid
Liquid
Gas
Plasma
Question 6: The temperature at which a substance changes its state from liquid to gas is called:
Melting point
Boiling point
Freezing point
Condensation point
Question 7: The process of changing a gas into a liquid is known as:
Evaporation
Condensation
Sublimation
Melting
Question 8: Which of the following does not have a fixed shape but has a fixed volume?
Solid
Liquid
Gas
Plasma
Question 9: Which gas is commonly used in the refrigerator for cooling?
Oxygen
Nitrogen
Helium
Freon
Question 10: The phenomenon of change of a gas into a liquid is termed as:
Condensation
Evaporation
Sublimation
Melting
Question 11: Which of the following substances shows the phenomenon of sublimation?
Water
Methane
Camphor
Salt
Question 12: The process of a liquid changing into a solid is known as:
Condensation
Evaporation
Freezing
Melting
Question 13: The change of a substance directly from a gas to a solid is called:
Sublimation
Condensation
Deposition
Evaporation
Question 14: Which of the following is an example of a homogeneous mixture?
Air
Sand and water
Oil and water
Milk
Question 15: The smallest particle of an element that retains its chemical properties is called:
Atom
Molecule
Ion
Compound
Question 16: What is the SI unit of temperature?
Celsius
Kelvin
Fahrenheit
Rankine
Question 17: Which of the following is a physical change?
Burning of paper
Rusting of iron
Boiling of water
Cooking an egg
Question 18: The melting point of ice is:
0°C
100°C
273 K
373 K
Question 19: The chemical formula for water is:
CO2
H2O
O2
NaCl
Question 20: Which of the following is an example of a physical change?
Rusting of iron
Burning of wood
Digestion of food
Photosynthesis
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