The modified equation for water potential is:

1. ${\mathrm{\Psi }}_{\mathrm{w}}=$ ${\mathrm{\Psi }}_{\mathrm{s}}$ $+$ ${\mathrm{\Psi }}_{\mathrm{p}}$

2. ${\mathrm{\Psi }}_{\mathrm{w}}$ $=$ ${\mathrm{\Psi }}_{\mathrm{s}}-{\mathrm{\Psi }}_{\mathrm{p}}$

3. ${\mathrm{\Psi }}_{\mathrm{w}}={\mathrm{\Psi }}_{\mathrm{s}}$

4. ${\mathrm{\Psi }}_{\mathrm{w}}={\mathrm{\Psi }}_{\mathrm{p}}-{\mathrm{\Psi }}_{\mathrm{s}}$

If mass flow is occurring like suction through a straw

Select the correct statement:-

1. Pure water has minimum $\psi \omega$

2. Pure water has maximum $\psi \omega$

3. Pure water has maximum DPD

4. Pure water has variable DPD

If a pressure greater than atmospheric pressure is applied to a solution, its water potential:

1. Increases

2. Decreases

3. Remains the same

4. Becomes zero

Water potential is not

1. Denoted by Greek symbol psi

2. Expressed in pressure units such as Pascals (Pa)

3. At standard temperature not under any pressure, is taken zero

4. Always negative or zero

Water molecules show a motion

Osmotic pressure of a solution is
1. more than that of pure solvent
2. less than that of pure solvent
3. variable depending upon concentration
4. equal to that of pure solvent

Consider the following:

I.    A decrease in pressure on cell exerted by the wall
II.   An increase in water potential of the surroundings
III.  The uptake of solutes by the cell
IV.  An increase in the tension on the surrounding solution

Which of the above would contribute to the uptake of water by the cell?

1. I, II, III

2. II, III, IV

3. I, II, IV

4. I, III, IV

Find the correct one.

1. All the solutions have lower water potential than pure water given that solution is under external pressure.

2. All the solutions have lower water potential than pure water.

3. All the solutions have higher water potential than pure water.

4. All the solutions have lower water potential than pure water unless the solution is under such external pressure which is more than the solute potential.

What shall be the water potential of a root hair cell absorbing water from the soil?
1.  Zero
2.  Less than zero
3.  More than zero
4.  Infinite