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1
JEE Main 2021 (Online) 31st August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Select the graph that correctly describes the adsorption isotherms at two temperatures T1, and T2 (T1 > T2) for a gas :

(x - mass of the gas absorbed ; m - mass of adsorbent ; P - pressure)
A
JEE Main 2021 (Online) 31st August Morning Shift Chemistry - Surface Chemistry Question 35 English Option 1
B
JEE Main 2021 (Online) 31st August Morning Shift Chemistry - Surface Chemistry Question 35 English Option 2
C
JEE Main 2021 (Online) 31st August Morning Shift Chemistry - Surface Chemistry Question 35 English Option 3
D
JEE Main 2021 (Online) 31st August Morning Shift Chemistry - Surface Chemistry Question 35 English Option 4
2
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.
3
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]
4
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
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