Question

Read the following statements and select the correct option.

(i) Pure water has the highest water potential, i.e., zero.
(ii) Process of diffusion does not require any input of energy.
(iii) Water moves from the system containing water at higher water potential to the one having lower water potential.

• A. Statements (i) and (ii) are correct
• B. Statements (ii) and (iii) are correct
• C. Statements (i) and (iii) are correct
• D. Statements (i), (ii) and (iii) are correct

Answer 1

Answer: (D)

Statements (i), (ii) and (iii) are correct

Pure water is with no dissolved solutes hence its potential is highest that is zero, as solute is added to water potential or energy of water becomes negative. Diffusion is movement of substances from their higher potential/energy/concentration to places of lower potential /energy/concentration hence does not require in put of energy.

Water always moves from its higher potential i.e with lower solute potential to its lower potential or higher solute potential by a process called osmosis.

So, the correct answer is 'Statements (i), (ii) and (iii) are correct'