With reference to the movement of molecules of fluid in plant, consider the following statements.<br>1. Diffusion is the movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration.<br>2. Osmosis is a process in which the water molecules move through a semipermeable membrane from the region of their lower concentration to the region of their higher concentration.<br>Which of the statement(s) given above is/are correct ?

Consider the following statements regarding the importance of diffusion and choose the correct answer:
1. The exchange of gases takes place by the principle of dependent diffusion
2. The process of diffusion is involved in transpiration of water vapours
3. The ions are absorbed by the simple diffusion during passive salt uptake
4. Diffusion is an effective means of transport of substances over a very short distance and helps in the translocation of food materials

A

1, 3 and 4 are true

B

1 and 4 are true

C

1, 2 and 3 are true

D

2, 3 and 4 are true

Assertion (A) In osmosis, solvent molecules pass through a semipermeable membrane from a more dilute solution to a more concentrated one, when these two are separated by the semi-permeable membrane.
Reason (R) The vapour pressure of the solvent over the dilute solution is less than that over the concentrated solution.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true, but R is not the correct explanation of A

C

A is true, but R is false

D

A is false, but R is true

A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then
i) the ball will move to the front
ii) the bubble will move to the front
iii) the ball will move to the rear
iv) the bubble will move to the rear
Find out which of the above statements are correct ?

A

(i) and (ii)

B

(i) and (iv)

C

(ii) and (iii)

D

(iii) and (iv)

Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?

A

Exact concentration of solution is not given

B

Character of semi permeable membrane is not given

C

The flow of solution is not possible through semi permeable membrane

D

All are incorrect

Consider the following statements.
1. During the pressure of osmosis, the solvent travels from the concentrated solution to the dilute solution.
2. In the reverse osmosis, external pressure is applied to the dilute solution.
Which of the statement(s) given above is/are correct?

A

Only 1

B

Only 2

C

Both 1 and 2

D

Neither 1 nor 2

Name the term which is given for the movement of water through a semipermeable membrane?

A

Diffusion

B

Osmosis

C

Tonicity

D

Transpiration

If a higher priority process arrives and wants service, the memory manager can swap out the lower priority process to execute the higher priority process. When the higher priority process finishes, the lower priority process is swapped back in and continues execution. This variant of swapping is sometimes called?

A

priority swapping

B

pull out, push in

C

roll out, roll in

D

none of the mentioned

_______________ is the movement of molecules across a cell membrane from a region of their lower concentration to a region of their higherconcentration.

A

Diffusion

B

Osmosis

C

Active Transport

D

Passive Transport

Consider the following statements.
1. The rate of diffusion of liquids is higher than that of solids.
2. In the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.
Which of the statement(s) given above is/are correct.

A

Only 1

B

Only 2

C

Both 1 and 2

D

None of these

Consider the following statements.
1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?

A

Both 1 and 2

B

Only 1

C

Only 2

D

Neither 1 nor 2