A) The chemical reaction of particles B) The diffusion of a large number of particles C) The diffusion of a single particle D) The motion of a fluid in a pipe
A) It involves repulsive interactions only B) It requires high concentration C) It only occurs in gases D) It refers to the diffusion of a single particle
A) The diffusion coefficient increases with concentration B) Particles always repel each other C) Interactions between all components are identical D) The particles are larger than the solvent molecules
A) It increases as concentration increases B) It decreases as concentration increases C) It is independent of particle concentration D) It is dependent on concentration
A) It becomes zero B) It tends to increase as concentration increases C) It remains constant D) It tends to decrease as concentration increases
A) It tends to increase as concentration increases B) It causes precipitation C) It tends to decrease as concentration increases D) It makes the diffusion coefficient constant
A) The diffusion coefficient becomes zero B) They become a gas C) They coalesce and form clusters D) They move faster
A) Evaporation B) Ideal mixing C) Precipitation D) Brownian motion
A) Stagnant fluid or laminar flow B) Solid state only C) Turbulent flow only D) Vacuum only
A) dCA/dx B) dCA/dt C) D * dCA/dx D) -dCA/dx
A) The number of molecules is negative B) The temperature is decreasing C) Concentration of A decreases as distance x increases D) Diffusion is moving in the negative direction
A) The pressure of the gas B) The temperature of the gas C) The rate of diffusion NA D) The total number of molecules
A) Turbulent mixing B) High pressure only C) No bulk motion D) Constant temperature only
A) Only the concentration B) The volume of the container C) Only the distance x D) Average molecular velocity
A) Only the container shape B) Only the concentration gradient C) Temperature and pressure D) Only the fluid viscosity
A) Force per unit area B) Distance per unit time C) Number of moles per unit volume D) Number of moles per unit area per unit time
A) Temperature gradient only B) Concentration gradient C) Pressure gradient only D) Average molecular velocity
A) Neither dCA/dx nor dCB/dx change with time B) The concentration is zero C) Diffusion stops completely D) The pressure is equalized
A) 2.299·10−9 m2·s−1 B) 1.261·10−8 m2·s−1 C) 2.299·10−8 m2·s−1 D) 1.261·10−9 m2·s−1
A) Equilibrium B) High concentration gradient C) Non-equilibrium D) Phase transition
A) Electronic charge B) Molecular vibration frequency C) Nuclear spin precession phase D) Atomic mass
A) 1.261·10−8 m2·s−1 B) 2.299·10−8 m2·s−1 C) 2.299·10−9 m2·s−1 D) 1.261·10−9 m2·s−1
A) Room temperature B) Above absolute zero C) Above 100 degrees Celsius D) Below absolute zero
A) Fick's laws B) Hooke's laws C) Dalton's laws D) Newton's laws
A) Crystallization B) Extrusion C) Sintering D) Distillation
A) Doping B) Osmosis C) Sintering D) Catalysis
A) Stomach B) Kidneys C) Liver D) Lungs
A) Silver B) Lead C) Gold D) Carbon
A) Separation of phases B) Creation of an energy gradient C) Complete mixing D) Increase in viscosity
A) Etching B) Soldering C) Cleaning D) Doping
A) Large proteins B) Cell walls C) Amino acids D) Complex carbohydrates
A) Irreversible B) Cyclic C) Equilibrium-based D) Reversible
A) Newtonian mechanics B) Quantum electrodynamics C) Landau-Lifshitz fluctuating hydrodynamics D) General relativity
A) Chemical bond creation B) Gravitational forces C) Fluctuations D) External heat sources
A) Locally in quasi-steady states B) When the system is at equilibrium C) When the system is cold D) When the system is large
A) PA = CA / RT B) PA = CA - RT C) PA = CART D) PA = CA + RT
A) DAB = 2DBA B) DAB = DBA / 2 C) DAB = -DBA D) DAB = DBA
A) The gas is incompressible B) The gas behaves ideally C) The gas is at zero temperature D) The gas is at high pressure |