The number of sphere contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is
In (i) 2 and in (ii) 4
The number of spheres in one body centred cubic and in one face centred cubic unit cell is 2 and 4 respectively.
A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behavior is the characteristic of substances forming.
Amorphous substances show
(i) short and long range order
(ii) short range order
(iii) long range order
(iv) have no sharp melting point
The solid NaCl is a bad conductor of electricity since
The correct statement in the following 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 = 900 and γ = 1200 is
If Z is the number of atoms in the unit cell that represents the closest packing sequence …… ABC ABC …… the number of tetrahedral voids in the unit cell is equal to
In which of the following crystals alternate tetrahedral voids are occupied?
A solid is made of two elements X and Z. the atoms Z are in ccp arrangement while the atom X occupy all the tetrahedral sites. What is the formula of the compound?
An element occurring in the bcc structure has 12.08 × 1023 unit cells. The total number of atoms of the elements in these cells will be
CsBr crystal has bcc structure. It has an edge length of 4.3. the shortest interionic distance between Cs+ and Br – ions is