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1.
All the substances becomes diamagnetic at :
2.
For a crystal system 
and 
and
3.
The number of atoms 
contained within a cubic cell is :
contained within a cubic cell is :
4.
A fcc element (atomic mass = 60) has a cell edge of 400 pm. Its density is :
5.
The unit cell with dimensions 
is
is
6.
Which has no rotation of symmetry?
7.
Total volume of atoms present in a face centred cubic unit cell of a metal is (r=atomic radius )
8.
Lithium borohydride crystallizes in an orthorhombic system with 4 molecule per unit cell. The unit cell dimensions are 
and 
. If the molar mass is 21.76, then the density of crystals is :
and . If the molar mass is 21.76, then the density of crystals is :
9.
Percentage of free space in cubic close packed structure and in body centred packed structure are respectively
10.
In a face centred cubic lattice the number of nearest neighbours for a given lattice point are :