00:02
Hi, osmosis is a process where there is a movement of the solvent from an area of low salute concentration to an area of high salute concentration.
00:15
Osmosis requires a semi -permeable membrane which should divide the two concentration areas.
00:22
If you look at a diagram b, there is movement of the salute and not the solvent.
00:27
So which is not a characteristic of osmosis.
00:29
So diagram b does not depict osmosis.
00:34
In diagram c and d, there is absence of semi -permeable membrane, which is a prerequisite for osmosis.
00:46
Seeing both the diagrams, you cannot see the semi -perfebiumal membrane.
00:49
So both these diagrams does not depict osmosis.
00:55
So for question 15, diagram a is correct.
01:00
Because in diagram a, you can see that there is a movement of water molecules from an area of low salute concentration to a high salute concentration which is a characteristic of osmosis.
01:13
When the salute concentration of one area is different from the salute concentration of another area, that is if the salute concentration of this area is high and if this area is low then a concentration gradient is established between these two areas.
01:29
So this is called as the concentration gradient.
01:34
In option a there is movement of salutes from the high concentration area.
01:39
To the low concentration area which is the characteristic of diffusion so it does not depict concentration gradient so option a is wrong in case of option c random movement of salutes is a characteristic of diffusion and not concentration gradient so option c is wrong in case of option d when there is equal concentration on two areas between two areas then they are said to be in equilibrium there is no concentration gradient between the two areas.
02:11
So option b is wrong.
02:15
So for question 16 option option option is a correct option because a concentration gradient is established only when there is unequal distribution of solutions between two areas...