MEDIUM
12th ICSE
IMPORTANT
Earn 100

Explain the F-centres giving a suitable example.

Important Questions on The Solid State

HARD
12th ICSE
IMPORTANT
In which pair most efficient packing is present?
MEDIUM
12th ICSE
IMPORTANT
Why diamond is harder than graphite?
MEDIUM
12th ICSE
IMPORTANT
Which of the crystals will have more density, a crystal with bcc unit cells or a crystal with fcc unit cell?
EASY
12th ICSE
IMPORTANT
What is meant by 'doping' in a semiconductor?
EASY
12th ICSE
IMPORTANT
How can the conductivity of an intrinsic semiconductor be increased?
EASY
12th ICSE
IMPORTANT
Why does urea have a sharp melting point, but glass does not?
MEDIUM
12th ICSE
IMPORTANT
How cubic lattices are different from tetragonal lattices?
MEDIUM
12th ICSE
IMPORTANT
A compound formed by the elements X and Y and crystallises in the cubic structure. Atoms Y are present on the corners as well as face centres whereas atoms X are present in the edge centres as well as body centre. What is the formula of the compound?