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1
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
For the coagulation of a negative sol, the species below, that has the highest flocculating power is :
A
Na+
B
Ba2+
C
PO$$_4^{3 - }$$
D
SO$$_4^{2 - }$$
2
JEE Main 2021 (Online) 17th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
A colloidal system consisting of a gas dispersed in a solid is called a/an :
A
foam
B
aerosol
C
solid sol
D
gel
3
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
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.
4
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
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
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