JEE Main 2022 (Online) 28th June Morning Shift | Surface Chemistry Question 25 | Chemistry

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JEE Main 2022 (Online) 28th June Morning Shift

MCQ (Single Correct Answer)

-1

The Zeta potential is related to which property of colloids?

Colour

Tyndall effect

Charge on the surface of colloidal particles

Brownian movement

JEE Main 2022 (Online) 28th June Morning Shift

MCQ (Single Correct Answer)

-1

Which one of the following techniques is not used to spot components of a mixture separated on thin layer chromatographic plate?

I₂ (Solid)

U.V. Light

Visualisation agent as a component of mobile phase

Spraying of an appropriate reagent

JEE Main 2022 (Online) 27th June Morning Shift

MCQ (Single Correct Answer)

-1

Match List-I with List-II

	List - I		List - II
(A)	Lyophilic colloid	(I)	Liquid-liquid colloid
(B)	Emulsion	(II)	Protective colloid
(C)	Positively charged colloid	(III)	FeCl$$_3$$ + NaOH
(D)	Negatively charged colloid	(IV)	FeCl$$_3$$ + hot water

Choose the correct answer from the options given below :

(A) - (II), (B) - (I), (C) - (IV), (D) - (III)

(A) - (III), (B) - (I), (C) - (IV), (D) - (II)

(A) - (II), (B) - (I), (C) - (III), (D) - (IV)

(A) - (III), (B) - (II), (C) - (I), (D) - (IV)

JEE Main 2022 (Online) 25th June Morning Shift

MCQ (Single Correct Answer)

-1

Incorrect statement for Tyndall effect is :

The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.

The diameter of the dispersed particles is much smaller than the wavelength of the light used.

During projection of movies in the cinemas hall, Tyndall effect is noticed.

It is used to distinguish a true solution from a colloidal solution.

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