AP EAMCET20224 Jul 2022Morning ShiftChemistryIonic EquilibriumActual
Assertion (A) : Blood cells collapse when suspended in saline water Reason (R): Cell membrane dissolves in saline water
Options
- ABoth (A) and (R) are correct and R is the correct explanation of A
- BBoth (A) and (R) are correct, but R is not the correct explanation of A
- C(A) is correct but (R) is not correct
- D(A) is incorrect but (R) is correct
Correct answer
C. (A) is correct but (R) is not correct
Step-by-step solution
The osmotic pressure associated with the fluid inside the blood cell is equivalent to that of 0.9% (mass/ volume) sodium chloride solution, called normal saline solution and it is safe to inject intravenously. On the other hand, if we place the cells in a solution containing more than 0.9% (mass/volume) sodium chloride, water will flow out of the cells and they would shrink. Such a solution is called hypertonic. If the salt concentration is less than 0.9% (mass/volume), the solution is said to be hypotonic. In this