Q. 334.0( 4 Votes )
In isotonic solutions ________________.
A. solute and solvent both are same.
B. osmotic pressure is same.
C. solute and solvent may or may not be same.
D. solute is always same solvent may be different.
Two solutions which have the same osmotic pressure at a given temperature are said to be isotonic in nature. The osmotic pressure of a given solution is given by the formula
π = CRT = n/VRT
Where π is the osmotic pressure of the solution, C is the concentration, the moles of solute per volume of solvent and T is the temperature, with R being universal gas constant. Osmotic pressure is a colligative property, hence it depends on the concentration of the solute in the solution and not the identity of either two. Hence the solvent and solute may or may not be the same.
Hence the correct answers are (ii) and (iii).
Rate this question :
A statement of assertion followed by a statement of reason is given. Choose the correct answer out of the option given below each equation.
Assertion : When NaCl is added to water a depression in freezing point is observed.
Reason : The lowering of vapour pressure of a solution causes depression in the freezing point.
Chemistry - Exemplar
Match the laws given in Column I with expressions given in Column II.