Why is the dipole moment of NH3 greater then that of NF3 ??
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what is F centre?
what is the full form of hcp and ccp?
If Nacl is doped with 10-3 mole % of Srcl2 , what is the concentration of cation vacancies?
How can non-stoichiometric FeO act as a p-type semiconductor?
equivalent weight of silver nitrate
which of the following is an example of metallic crystal solid?
(a) C ( b) Si (c) W (d) AgCl
why are frenkel defects not found in pure alkali halides?
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Q. Why old glass objects appear slightly milky instead of being transparent?
1. what r true solids and pseudo solids?
2. why crystalline solids are true solids and amorphous solids r pseudo solids?
What is Schottky and Frenkel defects?
A unit cell of ccp or fcc lattice is divided into eight small cubes. Then, each small cube has 4 atoms at alternate corners. When these are joined to each other, a regular tetrahedron is formed.
Cnt undrstnd it.. That how tetrahedron is formed on joining them???
why does AgBr show both frenkel n schottky defect? and why does ONLY AgBr show both d defects?
Dipole moment of p-dichlorobenzene is zero, but for p-dihydroxybenzene dipole moment is not zero.
The number of atoms in 100g of FCC crystal with density = 10g/cm3 and cell edge equal to 200 pm is equal to _____?
what is cryoscopic constant?
If the radius of the tetrahedral void is r and radius of the atoms in close packing is R, derive the relation between r and R?
A compound formed by elements X and Y crystallizes in the cubic structure where Y atoms are at the corners of the cube and X atoms are at the alteranate faces. What is the formula of the compound?
wwhich one of the following will have a low heat of fusion?(A)a covalent solid
(B)an ionic solid
(C)a mettallic solid
(D)a molecular solid
Which point defects lowers the density of a crystal?
In numericals,we use Z values-1 for sc,2 for bcc and 4 for fcc, but in this given question:
Potassium crystallises in a bcc lattice,hence the coordination number of potassium metal is 8. Why is it so?
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