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Face–centred Cubic, Face–centred Tetragonal, Body–centred Exercise Chapter 1 the Solid State Chemistry Class 12

Face–centred cubic, Face–centred tetragonal, Body–centred Chapter 1: the Solid State Chemistry Class 12 solutions are developed for assisting understudies with working on their score and increase knowledge of the subjects. Question 8 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 is solved by our expert teachers. You can get ncert solutions and notes for class 12 chapter 1 absolutely free. NCERT Solutions for class 12 Chemistry Chapter 1: the Solid State is very essencial for getting good marks in CBSE Board examinations

Question 8 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

Answer:
(i) Face–centred cubic:-
A face–centred cubic (fcc) unit cell contains atoms at all the corners and at the centre of all the faces of the cube.
FACE CENTERED CUBIC
So lattice point at the corner = 8
Lattice point at the center of all faces = 6
Total number of lattice point = 14

(ii) Face–centred tetragonal
lattice point at the corner = 8
Lattice point at the center of all faces = 6
Total number of lattice point = 14

(iii) Body–centred
In Body centered cubic there are 8 lattice point at the corner and 1 is at the center so total 8+1 =9 lattice point

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