Solid State
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The correct relationship between edge length (a) and radius of atom (r) for BCC unit cell is
The correct relationship between edge length (a) and radius of atom (r) for BCC unit cell is
For FCC lattice,
Packing efficiency = π/3√2
Upvote 
The first co-ordination number of Cs+ in CsCl lattice is
The first co-ordination number of Cs+ in CsCl lattice is
CsCl has BCC structure in which Cl- is present at corners of cube and Cs+ at body centre.
Upvote From a sprinkler of length , water is throw out with tangentially at the rate of . If diameter of sprinkler is and moment of inertia is , the rate at which angular speed of sprinkler will increases is (assume there in no resistance to motion)
From a sprinkler of length , water is throw out with tangentially at the rate of . If diameter of sprinkler is and moment of inertia is , the rate at which angular speed of sprinkler will increases is (assume there in no resistance to motion)
Angular momentum imparted to sprinkler per
Upvote A prism has refracting angle of 300 and it is made of glass of refractive index . At what angle should a light ray be incident on a face of prism such that it passes normally through the other face?
A prism has refracting angle of 300 and it is made of glass of refractive index . At what angle should a light ray be incident on a face of prism such that it passes normally through the other face?
For normal emergence
From Snell’s Law
Upvote The coordination number of an atom in a body- centred cubic structure is___________.
[Assume that the lattice is made up of atoms]
The coordination number of an atom in a body- centred cubic structure is___________.
[Assume that the lattice is made up of atoms]
Coordination no. of an atom in BCC is 8.
Upvote The number of octahedral voids per lattice site in a lattice is………. (Rounded off to the nearest integer)
The number of octahedral voids per lattice site in a lattice is………. (Rounded off to the nearest integer)
Effective no. of octahedral voids in a lattice = n
Effective no. of lattice point in a lattice = n
Ratio = n/n = 1
Upvote The incorrect statement about the imperfections in solids is:
The incorrect statement about the imperfections in solids is:
- Density of solid decreases in Schottky defect and vacancy defect.
- Density of solid increases in interstitial defect.
- Density of solid remain unchanged in Frenkel defect.
Upvote An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm. The density of the element is 6.0g cm-3. The number of atoms in 180g of the element is_________× 1023 (Nearest integer)
An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm. The density of the element is 6.0g cm-3. The number of atoms in 180g of the element is_________× 1023 (Nearest integer)
B.C.C structure
a = 300 pm = 300 × 10-12 m
d = 6g/cm3
z = 2
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