Diffusion- The mixing of a substance with another substance due to the motion or movement of its particles is called diffusion. It is one of the properties of materials. The diffusion of one substance into another substance goes on until a uniform mixture is formed. Diffusion takes place in gases, liquids and solids.
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What is physics definition of diffusion?
diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration.
What is a short definition of diffusion?
Diffusion is defined as the movement of individual molecules of a substance through a semipermeable barrier from an area of higher concentration to an area of lower concentration [34].
What is diffusion class 9th Chapter 5?
Diffusion. It is the process of movement of substances from a region of high concentration to the region of low concentration until uniform concentration is finally acheived.
Which is the best definition of diffusion?
Diffusion can be defined as the movement of molecules from an area of their higher concentration to an area of their lower concentration. So, the correct answer is ‘Movement of molecules from an area of their higher concentration to an area of their lower concentration’.
What is diffusion give an example class 9?
Answer: Diffusion is a process of mixing of two substances kept in contact. Diffusion is due to molecular motion. If a jar of chlorine is opened in a large room, the odorous gas mixes with air and spreads to every part of the room.
What is diffusion in physics class 6?
“Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.”
What is diffusion give two examples?
(a) Diffusion is the mixing of a substance with another substance due to the motion of its particles. The smell of perfume spreads over a whole room is an example for diffusion. (b) Gases diffuse fast because of the large space between the particles in gases and high kinetic energy.
What is diffusion and its types?
The three types of diffusion are – simple diffusion, osmosis and facilitated diffusion. (i) Simple diffusion is when ions or molecules diffuse from an area of high concentration to an area of low concentration.
Who discovered diffusion?
In modern science, the first systematic experimental study of diffusion was performed by Thomas Graham.
What is diffusion and osmosis?
Osmosis is the movement of solvent particles from a solution that is diluted to a more concentrated one. In contrast, diffusion is the movement of particles from a higher concentration region to a region of lower concentration.
What is diffusion solid?
Diffusion in Solids Diffusion refers to the transport of atoms in a medium along a given direction, It takes place in solid liquid or gas. It occurs even in the absence of any external force.
What is diffusion Class 9 textbook?
Answer: Diffusion is the net movement of anything from a region of higher concentration to a region of lower concentration.
What is diffusion by Topper?
Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. One of the main characteristics of diffusion is the movement of molecules along the concentration gradient. Was this answer helpful? 0.
What is diffusion Ncert?
This process of movement of substances down a gradient of free energy is called diffusion.
What is diffusion in cell?
Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration. Passive diffusion is the movement of molecules across a membrane, such as a cell membrane. The movement does not require energy.
What is diffusion gas?
The diffusion is a net movement of atoms or molecules from highly concentrated region to low concentration region. In other words, the movement of atoms or molecules from high chemical potential region to the low chemical potential region.
Why is diffusion a physical change?
Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. The material that diffuses could be a solid, liquid or gas. Similarly, the medium in which diffusion occurs could also be in one of the three physical states.
What is diffusion give three example?
You can smell perfume because it diffuses into the air and makes its way into your nose. 2. Cigarette smoke diffuses into the air. 3. A few crystals of potassium permanganate in water will diffuse and turn the water purple.
What is the difference between diffusion and osmosis Class 9?
The primary differentiating factor between the two systems is the medium in which they are employed. Osmosis can only function in a liquid medium, but diffusion can occur in all three mediums (solid, liquid and gas). Furthermore, osmosis requires a semi-permeable membrane, while diffusion does not.
What is diffusion and its importance?
“Diffusion is the process of movement of molecules from a region of higher concentration to a region of lower concentration.” Diffusion in Plants. Diffusion is a very important process for photosynthesis where carbon dioxide from the stomata diffuses into the leaves and finally into the cells.
What is density Class 9?
Density Definition: Density is the measurement of how tightly a material is packed together. It is defined as the mass per unit volume. Density Symbol: D or ฯ Density Formula: ฯ = m/V, where ฯ is the density, m is the mass of the object and V is the volume of the object.
What is matter Class 9 Chemistry?
Anything that has mass and occupies space is called matter. A matter is made up of tiny particles called atoms. There are three states of matter. Solid, liquid, and gas.
What is diffusion in liquid?
Diffusion is also defined as the movement of particles from an area of high concentration to an area of low concentration in a given volume of fluid (either liquid or gas) down the concentration gradient.
Where is diffusion used?
Examples of diffusion in living organisms Oxygen and carbon dioxide, dissolved in water, are exchanged by diffusion in the lungs: oxygen moves down a concentration gradient from the air in the alveoli to the blood. carbon dioxide moves down a concentration gradient from the blood to the air in the alveoli.