Q30 / 180 · NEET 2017 · Botany

The water potential of pure water is

  • Correct answer
    A
    Zero
  • B
    Less than zero
  • C
    More than zero but less than one
  • D
    More than one

Solution

Water potential is the chemical potential of water. When the solute is added to the pure water, this chemical potential drops and the water potential also falls. The water potential of pure water in an open container is zero because there is no solute and the pressure in the container is zero. Water potential cannot be in positive, and when solute is added, it falls from less negative to more negative.
Figure

Hence, the correct answer is option: 'A'.

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