Solid State Tes...

Only One Option Correct Type
This section contains 9  multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q. Bravais three-dimensional lattices are of

The lattice site in a pure crystal cannot be occupied by

Number of formula units in unit cells of MgO (rock salt), ZnS (zinc blende) and Pt (fee) respectively are

A compound is formed by elements A and B and has cubic structure. A-atoms are at the corners and B-atoms are at the face centres. Thus, it is

The mass of a unit cell of   NaCL  corresponds to

At what angles for the first-order diffraction, spacing between two planes X respectively are  λand  λ/2 ?

A solid has a structure in which W-atoms are located at the corners of a cubic lattice, OF-atoms at the centre of edges and Na atom at the centre of the cube. The formula for the compound is

The number of atoms in primitive cubic unit cell, body-centred cubic unit cell and face-centred cubic unit cell are A , B and C respectively. Select the correct values.

For a second order diffraction using X-ray B ragg ’s equation, for a crystal with separation between two layers as d , following graphical study was observed when varying 0 at different λ.

What is the value of d?

One or More than One Options Correct Type
This section contains multiple type questions. Each question has 4 choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.
In which of the following primitive cells axial distances or edge lengths (a, b, c)are different?