Question
Biology Question on Transport in Plants
Osmotic pressure of a pure solvent at 25�C and 1 atm is always
A
less than its solute
B
more than its solution
C
negative
D
zero.
Answer
zero.
Explanation
Solution
Osmotic pressure is defined as the pressure required to completely stop the entry of water into an osmotically active solution across a semipermeable membrane. It is numerically equal to osmotic potential (or solute potential) but opposite in sign. The osmotic pressure of pure solvent at 25�C and 1 atm is zero.