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1
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
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Among the following the false statement is -
A
Lyophilic sol can be coagulated by adding an electrote
B
Tyndall effect can be used to distinguish between a colloidal solution and a true solution
C
It is possible to cause artificial rain by throwing electrified sand carrying charge opposite to the one on clouds from an aeroplane
D
Latex is a colloidal solution of rubber particles which are positively charged
2
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
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Given
Gas H2 CH4 CO2 SO2
Critical
Temperature / K 		33 190 304 630



On the basis of data given above, predict which of the following gases shows least adsorption on a definite amount of charcoal ?
A
SO2
B
CH4
C
H2
D
CO2
3
JEE Main 2019 (Online) 11th January Evening Slot
MCQ (Single Correct Answer)
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Among the colloids cheese (C), milk (M), and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is :
A
C : liquid in solid ; M : liquid in liquid ; S : solid in gas
B
C : liquid in solid ; M : liquid in solid ; S : solid in gas
C
C : solid in liquid ; M : liquid in liquid ; S : gas in solid
D
C : solid in liqid ; M : solid in liquid ; S : solid in gas
4
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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An example of solid sol is :
A
Butter
B
Hair cream
C
Gem stones
D
Paint
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