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What is the coordination number in a square close packed structure in two dimensions? - Chemistry

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प्रश्न

What is the coordination number in a square close packed structure in two dimensions?

विकल्प

  • 2

  • 3

  • 4

  • 6

MCQ
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उत्तर

4

Explanation:

Coordination number in a square closed packed structure in two dimensions is equal to 4 is shown as:

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Close Packed Structures of Solids
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अध्याय 1: Solid States - Exercises [पृष्ठ ५]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
अध्याय 1 Solid States
Exercises | Q I. 27. | पृष्ठ ५

संबंधित प्रश्न

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


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

Face-centred cubic


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?


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

  1. What is the length of the side of the unit cell?
  2. How many unit cells are there in 1.00 cm3 of aluminium?

The coordination number of AB having rock salt geometry is ____________.


Hexagonal close packed arrangement of ions is described as ____________.


In NaCl structure ____________.


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.


In the SF4 molecule, there are:


The octane number of Iso-octane is


The crystal system of a compound with unit cell dimensions a = 0.387, b = 0.387 and c = 0.504 nm and α = β = 90° and ϒ = 120° is


The packing efficiency of the two dimensional square unit cell shown below is:


Which of the following is frenkal effect.


Element 'B' forms ccp structures and A occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide 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 empirical formula for a compound with a cubic close packed arrangement of anions and with cations occupying all the octahedral sites in AxB. The value of x is ______. (Integer answer)


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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