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1
JEE Main 2019 (Online) 12th April Evening Slot
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Among the following, the INCORRECT statement about colloids is :
A
The range of diameters of colloidal particles is between 1 and to 1000 nm
B
they are larger than small molecules and have high molar mass
C
They can scatter light
D
The osmotic pressure of a colloidal solution is of higher order than the true solution at the same concentration.
2
JEE Main 2019 (Online) 12th April Morning Slot
MCQ (Single Correct Answer)
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Peptization is a :
A
process of converting soluble particles to form colloidal solution
B
process of converting precipitate into colloidal solution
C
process of bringing colloidal molecule into solution
D
process of converting a colloidal solution into precipitate
3
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
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The correct option among the following is :
A
Addition of alum to water makes it unfit for drinking.
B
Colloidal medicines are more effective because they have small surface area.
C
Colloidal paraticles in lyophobic sols can be precipitated by electrophoresis.
D
Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.
4
JEE Main 2019 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
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-1
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A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation

$${x \over m} = k{p^{0.5}}$$

Adsorption of the gas increase with :
A
Decrease in p and increase in T
B
Increase in p and decrease in T
C
Decrease in p and decrease in T
D
Increase in p and increase in T
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