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1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The coagulating power of electrolytes having ions Na+, Al3+ and Ba2+ for arsenic sulphide sol increases in the order:
A
Na+ < Ba2+ < Al3+
B
Al3+ < Ba2+ < Na+
C
Ba2+ < Na+ < Al3+
D
Al3+ < Na+ < Ba2+
2
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
According to Freundlich adsorption isotherm, which of the following is correct ?
A
$${x \over m} \propto {p^0}$$
B
$${x \over m} \propto {p^1}$$
C
$${x \over m} \propto {p^{1/n}}$$
D
All the above are correct for different ranges of pressure
3
AIEEE 2009
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which of the following statements is incorrect regarding physisorptions ?
A
It occurs because of vander Waal’s forces.
B
More easily liquefiable gases are adsorbed readily.
C
Under high pressure it results into multi molecular layer on adsorbent surface.
D
Enthalpy of adsorption ($$\Delta H_{adsorption}$$ ) is low and positive
4
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is
A
D < A < C < B
B
C < B < D < A
C
A < C < B < D
D
B < D < A < C
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