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1
JEE Main 2020 (Online) 5th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
An Ellingham diagram provides information about :
A
the temperature dependence of the standard Gibbs energies of formation of some metal oxides
B
the pressure dependence of the standard electrode potentials of reduction reactions involved in the extraction of metals
C
the conditions of pH and potential under which a species is thermodynamically stable
D
the kinetics of the reduction process
2
JEE Main 2020 (Online) 5th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Identify the correct molecular picture showing that happens at the critical micellar concentration (CMC) of an aqueous solution of a surfactant ( ◍ polar head; ∼ non-polar tail; ● water). JEE Main 2020 (Online) 5th September Morning Slot Chemistry - Surface Chemistry Question 57 English
A
(C)
B
(A)
C
(D)
D
(B)
3
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+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
4
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
An ionic micelle is formed on the addition of :
A
excess water to liquid JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Surface Chemistry Question 60 English Option 1
B
excess water to liquid JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Surface Chemistry Question 60 English Option 2
C
liquid diethyl ether to aqueous NaCl solution
D
sodium stearate to pure toluene
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