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Solutions — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistrySolutions2 Marks
Question
Define the following terms:
  1. Mole fraction.
  2. Isotonic solutions.
  3. Van't Hoff factor.
  4. Ideal solution.
✓

Answer

  1. Mole fraction is the ratio of number of moles of one component to the total number of moles in a mixture.
  2. Two solutions having same osmotic pressure at a given temperature are called Isotonic Solutions.
  3. Van’t Hoff factor is expressed as:
$\text{i}=\frac{\text{Normal molar mass}}{\text{abnormal molar mass}}$
  1. The solution which obeys Raoult’s law under all conditions is known as an ideal solution.

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