Chemistry
Solid State & Surface Chemistry
Previous Years Questions

Atom $\mathrm{X}$ occupies the fcc lattice sites as well as alternate tetrahedral voids of the same lattice. The packing efficiency (in %) of the resu...
For the given close packed structure of a salt made of cation X and anion Y shown below (ions of only one face are shown for clarity), the packing fra...
Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25oC. For this process, the correct statement is
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 compound MpXq has cubic close packing (ccp) arrangement of X. Its unit cell structure is shown below. The empirical formula of the compound is ...

## MCQ (More than One Correct Answer)

The correct option(s) related to adsorption processes is(are)
The correct statement(s) related to colloids is (are)
The cubic unit cell structure of a compound containing cation M and anion X is shown below. When compared to the anion, the cation has smaller ionic r...
The correct statement(s) about surface properties is (are)
The CORRECT statement(s) for cubic close packed (ccp) three dimensional structure is (are) :
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 ...
The given graphs/data I, II, III and IV represent general trends observed for different physisorption and chemisorption processes under mild condition...
Choose the correct reason for the stability of the Iyophobic colloidal particles
The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)

## Numerical

Consider an ionic solid $$MX$$ with $$NaCl$$ structure. Construct a new structure $$(Z)$$ whose unit cell is constructed from the unit cell of $$MX$$ ...
A crystalline solid of a pure substance has a face-centered cubic structure with a cell edge of $$400$$ $$pm.$$ If the density of the substance in the...
The number of hexagonal face that present in a truncated octahedron is

## Subjective

A compound AB has rock salt type structure. The formula weight of AB is 6.023 Y amu, and the closest A - B distance is Y1/3 nm, where Y is an arbitrar...
1 gm of charcoal adsorbs 100 ml 0.5 M CH3COOH to form a monolayer, and thereby the molarity of CH3COOH reduces to 0.49. Calculate the surface area of ...
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