1
IIT-JEE 2011 Paper 1 Offline
Numerical
+4
-0
To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mol of He and 1.0 mol of an unknown compound (vapour pressure 0.68 atm, at 0oC) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0oC is close to
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2
IIT-JEE 2011 Paper 1 Offline
MCQ (Single Correct Answer)
+1
-0.25
Among the following compound, the most acidic is
A
p-nitrophenol
B
p-hydroxybenzoic acid
C
o-hydroxybenzoic acid
D
p-toluic acid
3
IIT-JEE 2011 Paper 1 Offline
MCQ (More than One Correct Answer)
+2
-0.5
The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)
A
Adsorption is always exothermic
B
Physisorption may transform into chemisorption at high temperature
C
Physisorption increases with increasing temperature but chemisorption decreases with increasing temperature
D
Chemisorption is more exothermic than physisorption, however it is very slow due to higher energy of activation
4
IIT-JEE 2011 Paper 1 Offline
MCQ (Single Correct Answer)
+1
-0.25
Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is
A
1.78 M
B
2.00 M
C
2.05 M
D
2.22 M
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