1
JEE Main 2021 (Online) 27th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Lyophilic sols are more stable than lyophobic sols because :
A
there is a strong electrostatic repulsion between the negatively charged colloidal particles.
B
the colloidal particles have positive charge.
C
the colloidal particles have no charge.
D
the colloidal particles are solvated.
2
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is :
A
Fe4[Fe(CN)6]3
B
K5Fe[Fe(CN)6]2
C
HFe[Fe(CN)6]
D
KFe[Fe(CN)6]
3
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Tyndall effect is more effectively shown by :
A
true solution
B
lyophilic colloid
C
lyophobic colloid
D
suspension
4
JEE Main 2021 (Online) 26th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
The sol given below with negatively charged colloidal particles is :
A
FeCl3 added to hot water
B
KI added to AgNO3 solution
C
AgNO3 added to KI solution
D
Al2O3.xH2O in water
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