1
JEE Advanced 2013 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0.75
Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25oC. For this process, the correct statement is
A
The adsorption requires activation at 25oC.
B
The adsorption is accompanied by a decrease in enthalpy
C
The adsorption increases with increase of temperature
D
The adsorption is irreversible
2
JEE Advanced 2013 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

The arrangement of X$$-$$ ions around A+ ion in solid AX is given in the figure (not drawn to scale). If the radius of X$$-$$ is 250 pm, the radius of A+ is

JEE Advanced 2013 Paper 1 Offline Chemistry - Solid State & Surface Chemistry Question 14 English

A
104 pm
B
125 pm
C
183 pm
D
57 pm
3
IIT-JEE 2012 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

A compound MpXq has cubic close packing (ccp) arrangement of X. Its unit cell structure is shown below. The empirical formula of the compound is

IIT-JEE 2012 Paper 1 Offline Chemistry - Solid State & Surface Chemistry Question 13 English

A
MX
B
MX2
C
M2X
D
M5X14
4
IIT-JEE 2009 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

Among the electrolytes Na$$_2$$SO$$_4$$, CaCl$$_2$$, Al$$_2$$(SO$$_4$$)$$_3$$ and NH$$_4$$Cl, the most effective coagulating agent for Sb$$_2$$S$$_3$$ sol is

A
Na$$_2$$SO$$_4$$
B
CaCl$$_2$$
C
Al$$_2$$(SO$$_4$$)$$_3$$
D
NH$$_4$$Cl
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