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Short Answer Type

51. Define Raoult’s law?

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52. Why is the osmotic pressure measurement preferred for determining molecular mass of proteins?

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53. Why does the boiling point of a solvent increase by the presence of a solute in it?

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54. A deci-molar solution of K₄ [Fe(CN)₆] is 50% dissociated at 300 K. Calculate the osmotic pressure of solution (R = 0.082)/L atm K^–1)?

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55. Why is osmotic pressure considered a colligative property?

Answer:

colligative property depend on the number of solute particles irrespective of their nature relative to the total number of particles present in the solution.
Osmotic pressure depends upon the number of particles of solute, i.e., molarity of solute. Therefore, it is considered as colligative property.

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