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What is the Two Dimensional Coordination Number of a Molecule In Square Close Packed Layer? - Chemistry

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प्रश्न

What is the two dimensional coordination number of a molecule in square close packed layer?

उत्तर

In square close-packed layer, a molecule is in contact with four of its neighbours. Therefore, the two-dimensional coordination number of a molecule in square close-packed layer is 4.

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Close Packed Structures of Solids
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अध्याय 1: The Solid State - Intext Questions [पृष्ठ २१]

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एनसीईआरटी Chemistry [English] Class 12
अध्याय 1 The Solid State
Intext Questions | Q 14 | पृष्ठ २१

संबंधित प्रश्न

How many lattice points are there in one unit cell of each of the following lattice?

(i) Face-centred cubic

(ii) Face-centred tetragonal

(iii) Body-centred


A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body-centre. What is the formula of the compound? What are the coordination numbers of P and Q?


Ferric oxide crystallises in a hexagonal close-packed array of oxide ions with two out of every three octahedral holes occupied by ferric ions. Derive the formula of the ferric oxide.


Aluminium crystallises in a cubic close-packed structure. Its metallic radius is 125 pm.

(i) What is the length of the side of the unit cell?

(ii) How many unit cells are there in 1.00 cm3 of aluminium?


Hexagonal close packed arrangement of ions is described as ____________.


The arrangement ABC ABC.... is referred to as ____________.


In NaCl structure ____________.


Which of the following statement is not true about the hexagonal close packing?


Match the type of packing given in Column I with the items given in Column II.

Column I Column II
(i) Square close packing
in two dimensions 
(a) Triangular voids
(ii) Hexagonal close packing
in two dimensions
(b) Pattern of spheres is
repeated in every fourth layer
(iii) Hexagonal close packing
in three dimensions
(c) Coordination number 4
(iv) Cubic close packing
in three dimensions
(d) Pattern of sphere is
repeated in alternate layers

With the help of a labelled diagram show that there are four octahedral voids per unit cell in a cubic close packed structure.


How can you best describe the elongated octahedral structure of blue vitriol, CuSO4.5H2O?


The octane number of Iso-octane is


Total no. of voids in 0.5 mole of a compound forming hexagonal closed packed structure are:-


Which of the following is frenkal effect.


The right options for the number of tetrahedral and octahedral voids in the hexagonal primitive unit cells is ______.


The right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell is ______.


Ionic radii of cation A+ and anion B- are 102 and 181 pm respectively. These ions are allowed to crystallize into an ionic solid. This crystal has cubic close packing for B-. A+ is present in all octahedral voids. The edge length of the unit cell of the crystal AB is ______ pm. (Nearest integer)


The density of a pure substance 'X' whose atoms pack in cubic close pack arrangement is 1 g/cc. If all tetrahedral voids are occupied by 'Y' atoms. The value of '3a' is ______ g/cc, if the density of resulting solid is 'a' g/cc.

[Given: Atomic mass (X) = 30 g/mol, (Y) = 20 g/mol]


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