The modified equation for water potential is

(1)

(2)

(3) ${\mathrm{\Psi }}_{\mathrm{w}}={\mathrm{\Psi }}_{\mathrm{s}}$

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

Subtopic:  Water Potential Concept |
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If mass flow is occurring like suction through a straw

(1) It is due to positive hydrostatic pressure

(2) It is due to negative hydrostatic pressure

(3) It is due to concentration gradient

(4) All of these

Subtopic:  Water Potential Concept |
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Select the correct statement:-

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

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

3. Pure water has maximum DPD

4. Pure water has variable DPD

Subtopic:  Water Potential Concept |
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If a pressure greater than atmospheric pressure is applied to a solution, its water potential:

1. Increases

2. Decreases

3. Remains same

4. Becomes zero

Subtopic:  Water Potential Concept |
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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

Subtopic:  Water Potential Concept |
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Water molecules show a motion

(1) Random

(2) Rapid

(3) Constant

(4) All of these

Subtopic:  Water Potential Concept |
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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

Subtopic:  Water Potential Concept |
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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

Subtopic:  Water Potential Concept |
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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.

Subtopic:  Water Potential Concept |
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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

Subtopic:  Water Potential Concept |
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