JEE Main 2020 (Online) 8th January Morning Slot | Surface Chemistry Question 67 | Chemistry

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JEE Main 2020 (Online) 8th January Morning Slot

MCQ (Single Correct Answer)

-1

As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order :

AICl₃ > K₃[Fe(CN)₆] > K₂CrO₄ > KBr = KNO₃

K₃[Fe(CN)₆] < K₂CrO₄ < KBr = KNO₃ = AlCl₃

K₃[Fe(CN)₆] < K₂CrO₄ < AlCl₃ < KBr < KNO₃

K₃[Fe(CN)₆] > AlCl₃ > K₂CrO₄ > KBr > KNO₃

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

-1

Among the following, the INCORRECT statement about colloids is :

The range of diameters of colloidal particles is between 1 and to 1000 nm

they are larger than small molecules and have high molar mass

They can scatter light

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

JEE Main 2019 (Online) 12th April Morning Slot

MCQ (Single Correct Answer)

-1

Peptization is a :

process of converting soluble particles to form colloidal solution

process of converting precipitate into colloidal solution

process of bringing colloidal molecule into solution

process of converting a colloidal solution into precipitate

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

-1

The correct option among the following is :

Addition of alum to water makes it unfit for drinking.

Colloidal medicines are more effective because they have small surface area.

Colloidal paraticles in lyophobic sols can be precipitated by electrophoresis.

Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.

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