Chapter 2: Matter – Nature and Behaviour – Important MCQs
1. Which of the following is considered matter?
A. Light
B. Sound
C. Air
D. Smile
✔️ Answer: C. Air
2. The law of conservation of mass was given by:
A. Proust
B. Lavoisier
C. Dalton
D. Rutherford
✔️ Answer: B. Lavoisier
3. Which of the following is a homogeneous mixture?
A. Mud in water
B. Milk in water
C. Salt in water
D. Sand in water
✔️ Answer: C. Salt in water
4. Which mixture will show the Tyndall effect?
A. Sugar solution
B. Starch solution
C. Salt solution
D. Vinegar
✔️ Answer: B. Starch solution
5. Which one of the following is a colloid?
A. Salt solution
B. Sand in water
C. Milk
D. Air
✔️ Answer: C. Milk
6. In a suspension, the particles:
A. Are not visible and do not scatter light
B. Do not settle and cannot be filtered
C. Settle down and can be filtered
D. Do not settle and scatter light
✔️ Answer: C. Settle down and can be filtered
7. A solution that cannot dissolve any more solute at a given temperature is called:
A. Dilute solution
B. Saturated solution
C. Super-saturated solution
D. Concentrated solution
✔️ Answer: B. Saturated solution
8. Which of the following is a pure substance?
A. Milk
B. Air
C. Copper
D. Seawater
✔️ Answer: C. Copper
9. The scattering of light by colloidal particles is known as:
A. Brownian motion
B. Tyndall effect
C. Refraction
D. Diffraction
✔️ Answer: B. Tyndall effect
10. Which one is a compound?
A. Sulphur
B. Sodium
C. Carbon dioxide
D. Neon
✔️ Answer: C. Carbon dioxide
