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Capillary Action

Why is osmosi...

Question

Why is osmosis considered to be a type of diffusion ?

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Solution

Osmosis considered simply to be a special type of diffusion. It is defined as the passage of water molecules through a semi permeable membrane. .

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Assertion (A): Osmosis is a biological process

Reason (R): Osmosis is a special type of diffusion of water which occurs through differentially permeable membrane

Why are diffusion and osmosis not suitable for transportation in higher organisms like human beings?

Q. Assertion :Diffusion is a passive type of transport. Reason: Osmosis is an active process of membrane transport.

Q. Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
(a) swelling up of a raisin on keeping in water
(b) spreading of virus on sneezing
(c) earthworm dying on coming in contact with common salt
(d) shrinking of grapes kept in thick sugar syrup
(e) preserving of pickles in salt
(f) spreading of smell of cake being baked in the kitchen
(g) aquatic animals using oxygen dissolved in water during respiration

Q. Assertion :Osmosis is a special type of diffusion of water through a semi-permeable membrane. Reason: The net direction and rate of osmosis depends only on the pressure gradient.

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