Question

Endosmosis stops when the

• A. Solution becomes isotonic with respect to the surrounding solution
• B. Solution becomes hypertonic with respect to the surrounding solution
  
• C. Wall becomes permeable with respect to the surrounding solution
  
• D. Solution is kept in dark with respect to the surrounding solution
  

Answer 1

Answer: (A)

Solution becomes isotonic with respect to the surrounding solution

Osmosis means movement of water along the concentration gradient across a semipermeable membrane. Endosmosis is the entry of water into the cell when the solution present outside the cell is hypotonic and is having more of water molecules. The process of endosmosis continues till the concentration is equalize on both the sides of the semi-permeable membrane. Once the two solutions become isotonic, the flow of water stops. Thus, the correct answer is option A.