What is the C-C bond length in diamond?
1.31 Ao
2.6 Ao
1.54 Ao
0.86 Ao
A simple cubic cell is also known as a
Crystallite
Primitive
Poly crystal
none of these
Crystals having irregular external shapes but regular internal structures are known as
Crystallites
Primitives
Poly crystals
Unit cell
Which of the following is a non polar molecule?
NH3
H2O
CO2
H2
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 covalent network crystal is an exception in electrical conductivity?
silicon carbide
diamond
graphite
