What is the C-C bond length in diamond?
1.31 Ao
2.6 Ao
1.54 Ao
0.86 Ao
Which covalent network crystal is an exception in electrical conductivity?
silicon carbide
diamond
graphite
none of these
Which of the following are held together by both dispersion forces and dipole- dipole forces?
Semi polar molecules
Polar molecules
Quarter polar molecules
Non polar molecules
Which system does the metallic crystal have?
Face Centred cubic system
Body centred cubic system
Simple cubic system
Side centred cubic system
The smallest repeating unit in a crystal is known as
Unit cell
Crystallite
Poly crystal
Crystal lattice
