1
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
The osmotic pressure of a dilute solution of an ionic compound XY in water is four times that of a solution of 0.01 M BaCl2 in water. Assuming complete dissociation of the given ionic compounds in water, the concentration of XY (in mol L–1) in solution is :
A
4 × 10–4
B
6 × 10–2
C
4 × 10–2
D
16 × 10–4
2
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Among the following, the set of parameters that represents path function, is :
(A) q + w
(B) q
(C) w
(D) H–TS
A
(B) and (C)
B
(A) and (D)
C
(B), (C) and (D)
D
(A), (B) and (C)
3
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
The standard Gibbs energy for the given cell reaction in kJ mol–1 at 298 K is :

Zn(s) + Cu2+ (aq) $$ \to $$ Zn2+ (aq) + Cu (s),

E° = 2 V at 298 K

(Faraday's constant, F = 96000 C mol–1)
A
384
B
–192
C
–384
D
192
4
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Consider the van der Waals constants, a and b, for the following gases.

Gas Ar Ne Kr Xe
a/ (atm dm6 mol–2) 1.3 0.2 5.1 4.1
b/ (10–2 dm3 mol–1) 3.2 1.7 1.0 5.0

Which gas is expected to have the highest critical temperature?
A
Ne
B
Kr
C
Xe
D
Ar
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