Chapter-4 Matter Around Us — Online MCQ Test
SCIENCE · Samacheer Kalvi 9th · Tamil Nadu State Board
Practice Chapter-4 Matter Around Us with a free chapter-wise online MCQ test.
This chapter covers: Description Explains the states of matter their properties and physical changes Keywords Solid Liquid Gas Matter Properties.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-4 Matter Around Us — Important Questions & Answers
What is matter?
- A. Anything that has mass and occupies space
- B. Anything that gives light
- C. Anything that produces heat
- D. Anything that moves
Answer: A. Anything that has mass and occupies space
Matter is defined as anything that has mass and occupies space.
Matter is defined as anything that has mass and occupies space.
Which of the following is a property of solids?
- A. No fixed shape and no fixed volume
- B. Fixed shape and fixed volume
- C. Fixed shape but no fixed volume
- D. No fixed shape but fixed volume
Answer: B. Fixed shape and fixed volume
Solids have a definite shape and a definite volume because their particles are closely packed.
Solids have a definite shape and a definite volume because their particles are closely packed.
Why are gases easily compressible?
- A. Their particles are very close together
- B. Their particles are far apart
- C. They have fixed shape
- D. They have strong force of attraction
Answer: B. Their particles are far apart
Gas particles have large spaces between them, so they can be compressed easily.
Gas particles have large spaces between them, so they can be compressed easily.
Which of the following is the best reason why solids have a definite shape?
- A. Particles are very far apart
- B. Particles have strong force of attraction and fixed positions
- C. Particles move randomly with no attraction
- D. Particles can be compressed easily
Answer: B. Particles have strong force of attraction and fixed positions
In solids, particles are closely packed and held in fixed positions by strong intermolecular forces.
In solids, particles are closely packed and held in fixed positions by strong intermolecular forces.
Which change is reversible and classified as a physical change?
- A. Milk turning into curd
- B. Formation of ice from water
- C. Burning of candle wax only into ash
- D. Ripening of fruit
Answer: B. Formation of ice from water
Freezing water into ice is a physical and reversible change because the substance remains the same.
Freezing water into ice is a physical and reversible change because the substance remains the same.