States of Matter MCQs

41. The SI unit of pressure is:
A) Joule
B) Pascal
C) Newton
D) Watt
Answer: B) Pascal

42. Which state shows Brownian motion most clearly?
A) Solid
B) Liquid
C) Gas
D) Plasma
Answer: C) Gas

43. The process of liquid turning into gas at boiling point is:
A) Evaporation
B) Boiling
C) Condensation
D) Sublimation
Answer: B) Boiling

44. Which state has definite shape and high density?
A) Gas
B) Liquid
C) Solid
D) Plasma
Answer: C) Solid

45. Liquids are:
A) Highly compressible
B) Slightly compressible
C) Non-compressible
D) Extremely compressible
Answer: B) Slightly compressible

46. Which has highest density?
A) Gas
B) Liquid
C) Solid
D) Plasma
Answer: C) Solid

47. Which process is exothermic?
A) Melting
B) Evaporation
C) Condensation
D) Sublimation
Answer: C) Condensation

48. Which process is endothermic?
A) Freezing
B) Condensation
C) Sublimation
D) Deposition
Answer: C) Sublimation

49. Gas particles move in:
A) Fixed path
B) Circular path
C) Random motion
D) Straight line only
Answer: C) Random motion

50. Which state occupies maximum volume?
A) Solid
B) Liquid
C) Gas
D) Plasma
Answer: C) Gas