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JEE Main 201912 AprilEvening Shift
Exam
JEE Main
Year
2019
Date
12 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Surface Chemistry

JEE Main 2019 · 12 April · Evening Shift · Chemistry · Surface Chemistry

Among the following, the incorrect statement about colloids is:

Among the following, the incorrect statement about colloids is:

Options

  1. AThey are larger than small molecules and have high molar mass.
  2. BThey can scatter lighht.
  3. CThe osmotic pressure of a collodial solution is of higher order than the true solution at the same concentration.
  4. DThe range of diameters of colloidal particles is between 11 and 1000nm.1000nm .

Correct answer

C. The osmotic pressure of a collodial solution is of higher order than the true solution at the same concentration.

Step-by-step solution

Due to the bigger size of colloidal particles the number of particles in a colloidal solution is comparatively small as compared to a true solution. Hence the values of colligative properties are of small order as compared to values shown by true solutions at same concentration.
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