1
JEE Advanced 2015 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2
When O2 is adsorbed on a metallic surface, electron transfer occurs from the metal to O2. The true statement(s) regarding this adsorption is(are)
A
O2 is physisorbed
B
Heat is released
C
Occupancy of $$\pi _{2p}^*$$ of O2 is increased
D
Bond length of O2 is increased
2
JEE Advanced 2015 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are
A
1/2, 1/8
B
1, 1/4
C
1/2, 1/2
D
1/4, 1/8
3
IIT-JEE 2012 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2

The given graphs/data I, II, III and IV represent general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and pressure. Which of the following choice(s) about I, II, III and IV is(are) correct?

IIT-JEE 2012 Paper 2 Offline Chemistry - Solid State & Surface Chemistry Question 12 English 1

IIT-JEE 2012 Paper 2 Offline Chemistry - Solid State & Surface Chemistry Question 12 English 2

IIT-JEE 2012 Paper 2 Offline Chemistry - Solid State & Surface Chemistry Question 12 English 3

IIT-JEE 2012 Paper 2 Offline Chemistry - Solid State & Surface Chemistry Question 12 English 4

A
I is physisorption and II is chemisorption.
B
I is physisorption and III is chemisorption.
C
IV is chemisorption and II is chemisorption.
D
IV is chemisorption and III is chemisorption.
4
IIT-JEE 2012 Paper 1 Offline
MCQ (More than One Correct Answer)
+2
-0.5
Choose the correct reason for the stability of the Iyophobic colloidal particles
A
Preferential adsorption of ions on their surface from the solution
B
Preferential adsorption of solvent on their surface from the solution
C
Attraction between different particles having opposite charges on their surface
D
Potential difference between the fixed layer and the diffused layer of opposite charges around the colloidal particles.
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