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A compound AB having formula weight = 6.023×Y AMU, has rock salt type structure and the closest AB distance is Y13 nm, where Y is an arbitrary number. The density of lattice is

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Important Questions on Solid state

EASY
What are the coordination numbers (C.N.) of Ca2+ and F- ion in calcium fluoride CaF2 crystal structure ?
EASY
What is the value of radius ratio of ionic crystal having coordination number six?
MEDIUM
If the edge length of a body centred unit cell is 400pm, what will be the approximate radius of the atom present in it? (in pm)
HARD
If the angle of incidence of X-ray of wavelength 3 Å which produces a second order diffracted beam from the 100 planes in a simple cubic lattice with interlayer spacing a=6  is 30o, the angle of incidence that produces a first - order diffracted beam from the 200 planes is
EASY
A unit cell of calcium fluoride has four calcium ions. The number of fluoride ions in the unit cell is
MEDIUM
In a compound, atoms of element Y form ccp lattice and those of element X occupy 23 of tetrahedral voids. The formula of the compound will be
EASY
What is the co-ordination number of Cl- in NaCl crystal ?
MEDIUM
The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is:
MEDIUM
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 

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MEDIUM
The radius of K+ is 133 pm and that of Cl- is 181 pm. The volume of the unit cell of KCl expressed in 10-22 cm3 is:
MEDIUM
In a face centered cubic lattice atoms A are at the corner points and atoms B at the face centered points. If atom B is missing from one of the face centered points, the formula of the ionic compound is :
HARD
Consider an ionic solid MX, with NaCl structure. Construct a new structure Z, whose unit cell is constructed from the unit cell of MX, following the sequential instructions given below. Neglect the charge balance.

(i) Remove all the anions X, except the central one.

(ii) Replace all the face centered cations M, by anions X.

(iii) Remove all the corner cations M.

(iv) Replace the central anion X, with cation M.

The value of number of anionsnumber of cations in Z is _____.
HARD

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 radius. Choose the correct statement(s).

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HARD
Number of unit cells present in a cubic shaped ideal crystal of NaCl of mass 1.00 g is [Molecular mass =58.5]
HARD
NaCl is a FCC lattice where Na+ ions are at corner and face centre positions. Chloride ions are at edge centres and body centre positions. How many NaCl formula units will be in an unit cell
MEDIUM
The FCC-crystal contains how many atoms in each unit cell?
EASY
CsCl crystallises in body centred cubic lattice. If 'a' is its edge length then which of the following expressions is correct?
EASY
In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion Ca2+ and fluoride ion F- are
MEDIUM
The ionic radii of A+ and B- ions are 0.98×10-10m and 1.81×10-10 m . The coordination number of each ion in AB is