1
JEE Main 2020 (Online) 6th September Morning Slot
+4
-1
Kraft temperature is the temperature :
A
below which the aqueous solution of detergents starts freezing.
B
above which the formation of micelles takes place.
C
below which the formation of micelles takes place.
D
above which the aqueous solution of detergents starts boiling.
2
JEE Main 2020 (Online) 5th September Evening Slot
+4
-1
Adsorption of a gas follows Freundlich adsorption isotherm. If x is the mass of the gas adsorbed on mass
m of the adsorbent, the correct plot of $${x \over m}$$ versus p is :
A
B
C
D
3
JEE Main 2020 (Online) 5th September Morning Slot
+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
4
JEE Main 2020 (Online) 5th September Morning Slot
+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).
A
(C)
B
(A)
C
(D)
D
(B)
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