Diffusion

Q. The rate of diffusion of liquids is higher than that of solids because:

1. in the liquid state, particles move freely as compared to solids.
2. in solid state, particles have least force of attraction between the particles.
3. in solid state, particles cannot be compressed easily.
4. in the liquid state, particles are tightly packed.

Q.

What are the factors needed for maintaining the direction of diffusion in plants?

Q.

Explain the effects of temperature and pressure on the rate of diffusion.

Q.

How The smell of lighted incense stick spreads several meters away?

Q.

The random or zig-zag motion of the colloidal particles in the dispersion medium is referred to as:

1. Electro-osmosis

2. Diffusion

3. Brownian movement

4. Tyndall effect

Q. Rate of diffusion is highest in _______ and lowest in _________ respectively .

1. liquids, solids
2. liquids, gases
3. solids, liquids
4. gases, solids

Q. What is the rate of diffusion in solids?

1. Slow
2. Fast
3. Very fast
4. Only gases diffuse

Q.

What is the term used for attraction between molecules of the same substance?

1. Adsorption

2. Adhesion

3. Cohesion

4. Absorption

Q.

Does simple diffusion require special membrane proteins?

Q. Define the term: Diffusion

Q. When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :

1. distribution
2. intrusion
3. diffusion
4. effusion

Q.

Assertion:- When incense stick is lit then its fragrance spreads quickly in the room because of diffusion.

Reason:- Diffusion decreases on raising the temperature.

1. Assertion:- True

   Reason:- True

2. Assertion:- False

   Reason:- False

3. Assertion:- False

   Reason:- True

4. Assertion:- True

   Reason:- False

Q.

The rate of diffusion of hydrogen and chlorine are in the ratio of 6:1. The density of chlorine as compared to that of hydrogen will be:

1. 3

2. 6

3. 18

4. 36

Q.

What does a high permeability coefficient mean?

Q.

Out of solids liquids and gases which has least diffusion

Q.

What are the two processes which show that the particles of a gas move continuously?

Q. Which of the following are examples of diffusion of a solid into liquid?

1. Ink in water
2. Sugar cubes in tea
3. Potassium permanganate in water
4. Perfume in air

Q. Define diffusion. Discuss the various factors that affect the rate of diffusion ?

Q. The process in which gas molecules intermixes as a result of random motion is known as ___________.

1. evaporation
2. filtration
3. distillation
4. diffusion

Q.

Define intermolecular spaces.

Q.

Out of solid, liquid and gas

Which has least diffusion of the particles?

Q. During the Holi festival, we add solid colours to the water and the entire solution gets coloured. Which among the following phenomenon is responsible for the change of colour?

1. Melting
2. Boiling
3. Sublimation
4. Diffusion

Q. Aquatic animals like fish have __________ for respiration.

1. lungs
2. spiracle
3. trachea
4. gills

Q.

Higher the density of a substance, ......... will be the rate of diffusion

Q.

How does facilitated diffusion differ from diffusion?

Q.

Give two examples of diffusion in plants.

Q. Question 16
'Osmosisis a special kind of diffusion’. Comment.

Q.

How does a drop of red ink get evenly distributed in water ?

Q. If we open a bottle of perfume, its smell spreads in the entire room with in a short time due to the process of:

1. sublimation
2. diffusion
3. evaporation
4. decantation

Q. Choose the correct answers from the alternatives given.
In a fully turgid cell, which one of the following would be zero?

1. Wall pressure
2. Osmotic pressure
3. Suction pressure
4. Turgor pressure