1. The form of matter with definite volume, but indefinite shape is:
(A) Liquid
(B) Solid
(C) Gas
(D) Plasma
2. Spontaneous mixing of ink into water is:
(A) Evaporation
(B) Effusion
(C) Diffusion
(D) Sublimation
3. Ice is lighter than water because of:
(A) Density
(B) Boiling point
(C) Melting point
(D) None
4. Evaporation even takes place at:
(A) 0°C
(B) 100°C
(C) At all temperatures
(D) 200°C
5. Escape of high energy molecules from surface of a liquid:
(A) Diffusion
(B) Evaporation
(C) Effusion
(D) Sublimation
6. Surface tension is represented as:
(A) γ
(B) β
(C) α
(D) None
7. SI unit of surface tension is:
(A) None
(B) N
(C) N m²
(D) N m
8. 1 N m⁻¹ is equal to:
(A) J m⁻¹
(B) J m³
(C) J m²
(D) J m
9. Conversion of vapors into liquid is:
(A) Evaporation
(B) Condensation
(C) Effusion
(D) Diffusion
10. CGS unit of surface tension is:
(A) J m
(B) dyne cm⁻¹
(C) N m⁻¹
(D) None
11. Instrument used to measure surface tension is:
(A) Stalagmometer
(B) Thermometer
(C) Barometer
(D) Viscometer
12. Surface tension depends upon:
(A) Intermolecular forces
(B) Temperature
(C) Vapour pressure
(D) None
13. Surface tension _______ with increasing temperature:
(A) Increases
(B) Decreases
(C) Remains same
(D) None
14. The average kinetic energy of molecules _______ with increasing temperature:
(A) Decreases
(B) Remains same
(C) Increases
(D) None
15. Internal resistance to flow of liquid is:
(A) Surface tension
(B) None
(C) Evaporation
(D) Viscosity
16. Viscosity is represented as:
(A) α
(B) β
(C) γ
(D) η
17. SI unit of viscosity is:
(A) kg m⁻¹ s⁻¹
(B) kg m s⁻¹
(C) kg m⁻¹ s
(D) None
18. Instrument used to measure viscosity is:
(A) Barometer
(B) Thermometer
(C) Stalagmometer
(D) Viscometer
19. Viscosity _______ with increasing temperature:
(A) Increases
(B) Decreases
(C) Remains same
(D) None
20. Viscosity _______ with increasing molecular size:
(A) Decreases
(B) None
(C) Remains same
(D) Increases