JEE Main 2021 (Online) 25th July Evening Shift | Surface Chemistry Question 54 | Chemistry

List-I Example of colloids	List - II Classification
(a) Cheese	(i) dispersion of liquid in liquid
(b) Pumice stone	(ii) dispersion of liquid in gas
(c) Hair cream	(iii) dispersion of gas in solid
(d) Cloud	(iv) dispersion of liquid in solid

Choose the most appropriate answer from the options given below

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

JEE Main 2021 (Online) 22th July Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

When silver nitrate solution is added to potassium iodide solution then the sol produced is :

AgI / I^$$-$$

AgI / Ag⁺

KI / NO$$_3^ - $$

AgNO₃ / NO$$_3^ - $$

JEE Main 2021 (Online) 20th July Morning Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

The conditions given below are in the context of observing Tyndall effect in colloidal solutions :

(A) The diameter of the colloidal particles is comparable to the wavelength of light used.

(B) The diameter of the colloidal particles is much smaller than the wavelength of light used.

(C) The diameter of the colloidal particles is much larger than the wavelength of light used.

(D) The refractive indices of the dispersed phase and the dispersion medium are comparable.

(E) The dispersed phase has a very different refractive index from the dispersion medium.

Choose the most appropriate conditions from the options given below :

(A) and (E) only

(A) and (D) only

(B) and (E) only

JEE Main 2021 (Online) 18th March Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

The charges on the colloidal CdS sol and TiO₂ sol are, respectively :

positive and positive

positive and negative

negative and negative

negative and positive