1
JEE Main 2020 (Online) 4th September Evening Slot
+4
-1
A sample of red ink (a colloidal suspension) is prepared by mixing eosin dye, egg white, HCHO and water. The component which ensures stability of the ink sample is :
A
HCHO
B
Water
C
Eosin dye
D
Egg white
2
JEE Main 2020 (Online) 3rd September Evening Slot
+4
-1
An ionic micelle is formed on the addition of :
A
excess water to liquid
B
excess water to liquid
C
liquid diethyl ether to aqueous NaCl solution
D
sodium stearate to pure toluene
3
JEE Main 2020 (Online) 3rd September Morning Slot
+4
-1
Tyndall effect is observed when:
A
The diameter of dispersed particles is similar to the wavelenght of light used.
B
The diameter of dispersed particles is much smaller than the wavelength of light used.
C
The diameter of dispersed particles is much larger than the wavelength of light used.
D
The refractive index of dispersed phase is greater than that of the dispersion medium.
4
JEE Main 2020 (Online) 2nd September Evening Slot
+4
-1
Amongst the following statements regarding adsorption, those that are valid are

(a) $$\Delta$$H becomes less negative as adsorption proceeds
(b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas
(c) On adsorption, the residual force acting along the surface of the adsorbent increases
(d) With increase in temperature, the equilibrium concentration of adsorbate increases
A
(c) and (d)
B
(a) and (b)
C
(d) and (a)
D
(b) and (c)
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