Diffusion

What is diffusion?

• The process by which particles move from an area of high concentration to an area of low concentration.

• The movement of particles from an area of low concentration to an area of high concentration.

• The process by which particles stay stationary in a fluid.

• The movement of particles in a straight line.

What is meant by "concentration gradient" in the context of diffusion?

• The difference in temperature between two areas.

• The difference in particle concentration between two areas.

• The speed at which particles move.

• The amount of pressure applied to a fluid.

Which of the following factors does NOT affect the rate of diffusion?

• Temperature

• Concentration gradient

• Color of the fluid

• Size of the particles

How does temperature affect the rate of diffusion in fluids?

• Higher temperatures decrease the rate of diffusion.

• Temperature has no effect on the rate of diffusion.

• Lower temperatures increase the rate of diffusion.

• Higher temperatures increase the rate of diffusion.

Why does diffusion occur more quickly in gases than in liquids?

• Because gas particles are larger than liquid particles.

• Because gas particles are more closely packed than liquid particles.

• Because gas particles move more quickly than liquid particles.

• Because liquids are always colder than gases.

What role does the size of the particles play in the rate of diffusion?

• Larger particles diffuse more quickly because they can push other particles out of the way.

• The size of the particles does not affect the rate of diffusion.

• Smaller particles diffuse more quickly because they can move through the fluid more easily.

• Only particles of a specific size can diffuse.

In which scenario would the rate of diffusion be the fastest?

• A high concentration gradient, low temperature, and large particle size.

• A low concentration gradient, high temperature, and small particle size.

• A high concentration gradient, high temperature, and small particle size.

• A low concentration gradient, low temperature, and large particle size.

During diffusion, how does the movement of molecules proceed in relation to the concentration gradient?

• From areas of lower concentration to areas of higher concentration.

• From areas of higher concentration to areas of lower concentration.

• In a random direction, unaffected by concentration.

• Equally in all directions, maintaining the concentration gradient.

What factor primarily affects the rate of diffusion in gases?

• The temperature of the gas.

• The color of the gas.

• The smell of the gas.

• The sound made by the gas.

Which of the following is a real-life example of diffusion in liquids?

• A balloon inflating when heated.

• Food colouring spreading in water.

• Smoke rising in the air.

• A hot air balloon rising.