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
Crystals having irregular external shapes but regular internal structures are known as
Crystallites
Primitives
Poly crystals
Unit cell
The smallest repeating unit in a crystal is known as
Crystallite
Poly crystal
Crystal lattice
Which system does the metallic crystal have?
Face Centred cubic system
Body centred cubic system
Simple cubic system
Side centred cubic system
Which of the following is a non polar molecule?
NH3
H2O
CO2
H2