1
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Tyndall effect is observed when:
A
The diameter of dispersed particles is similar to the wavelenght of light used.
B
The diameter of dispersed particles is much smaller than the wavelength of light used.
C
The diameter of dispersed particles is much larger than the wavelength of light used.
D
The refractive index of dispersed phase is greater than that of the dispersion medium.
2
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
In a molecule of pyrophosphoric acid, the number of P - OH, P = O and P - O - P bonds/moiety(ies) respectively are :
A
4, 2 and 0
B
4, 2 and 1
C
3, 3 and 3
D
2, 4 and 1
3
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Let CNaCl and CBaSO4 be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO4, respectively, at a temperature T. Which of the following is false?
A
Ionic mobilities of ions from both salts increase with T.
B
CNaCl(T2) > CNaCl(T1) for T2 > T1
C
CBaSO4(T2) > CBaSO4(T1) for T2 > T1
D
CNaCl >> CBaSO4 at a given T
4
JEE Main 2020 (Online) 3rd September Morning Slot
Numerical
+4
-0
Change Language
The mole fraction of glucose (C6H12O6 ) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the nearest integer, is _______.
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