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1
JEE Main 2021 (Online) 17th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
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A colloidal system consisting of a gas dispersed in a solid is called a/an :
A
foam
B
aerosol
C
solid sol
D
gel
2
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
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-1
Out of Syllabus
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The INCORRECT statements below regarding colloidal solutions is :
A
The flocculating power of Al3+ is more than that of Na+.
B
A colloidal solutions shows Brownian motion of colloidal particles.
C
An ordinary filter paper can stop the flow of colloidal particles.
D
A colloidal solutions shows colligative properties.
3
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The nature of charge on resulting colloidal particles when FeCl3 is added to excess of hot water is :
A
neutral
B
sometimes positive and sometimes negative
C
positive
D
negative
4
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Which one of the following statements is FALSE for hydrophilic sols?
A
They do not require electrolytes for stability.
B
The sols cannot be easily coagulated.
C
These sols are reversible in nature.
D
Their viscosity is of the order of that of H2O.
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