JEE Main 2019 (Online) 12th April Morning Slot | Surface Chemistry Question 69 | Chemistry

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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.

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

-1

In chromatography, which of the following statements is incorrect for R_f ?

R_f value depends on the type of chromatography.

Higher R_f value means higher adsorption.

R_f value is dependent on the mobile phase.

The value of R_f can not be more than one.

JEE Main 2019 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

-1

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 :

Decrease in p and increase in T

Increase in p and decrease in T

Decrease in p and decrease in T

Increase in p and increase in T

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