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प्रश्न
What is meant by the term ‘coordination number’?
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उत्तर
The number of nearest neighbours with which a given particle is in direct contact in a crystal is called the coordination number.
संबंधित प्रश्न
What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 1/3rd of tetrahedral voids?
Name the parameters that characterize a unit cell.
Which of the following lattices has the highest packing efficiency (i) simple cubic (ii) body-centred cubic and (iii) hexagonal close-packed lattice?
An ionic crystal lattice has limiting value of radius ratio as 0.414 to 0.732; the co-ordination number of its cation is _______.
(A) 6
(B) 4
(C) 3
(D) 12
Which of the following parameters are correct for triclinic lattice?
(A) α = β = γ = 90° and a = b = c
(B) α ≠ β ≠ γ = 90° and a ≠ b ≠ c
(C) α = γ = 90°, β ≠ 90° and a ≠ b ≠ c
(D) α ≠ β ≠ γ ≠ 90° and a ≠ b ≠ c
In the complexes `[Fe(CN)_6]^(3-)` and `[pt(en) (H_2O)_2(NO_2 (Cl)^(2+)]``the respective oxidation numbers of central metal atoms are
1) +3 and +4
2) +6 and + 4
3) +6 and +3
4) +3 and + 3
How will you obtain pure potassium permanganate (KMnO4) crystals from its ore, pyrolusite? Give the steps involved and the reactions.
In a crystal of diamond:
- How many carbon atoms are present per unit cell?
- What type of lattice does diamond crystallise in?
- How many carbon atoms surround each carbon atom?
- How are they arranged?
A solid compound XY has NaCl structure. if the radius of the cation is 100 pm, the radius of the anion will be
The yellow colour in NaCl crystal is due to ____________.
Why ionic crystals are hard and brittle?
Crystals can be classified into basic crystal units, equal to ____________.
How many three-dimensional crystal lattices are possible?
The lattice site in a pure crystal cannot be occupied by ______.
How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g? [Atomic masses: Na = 23, Cl = 35.5]
