6 questions
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?
2
4
6
8
A crystalline solid:
changes abruptly from solid to liquid when heated.
has no definite melting point.
undergoes deformation of its geometry easily
has irregular 3-dimensional arrangements.
For orthorhombic system axial ratios are a b c and the axial angles are:
α = β = γ ≠ 90 degree
α ≠ β ≠ γ ≠ 90 degree
α = β = γ = 90 degree
α ≠ β ≠ γ = 90 degree
The coordination number of atoms in a body-centred cubic structure is ________.
4
6
8
12
Which of the following is a gaint network covalent solid?
(A) Iodine
(B) NaCl
(C) CsCl
(D) graphite
Which one of the following is a covalent crystal?
(A) Rock salt
(B) Ice
(C) Quartz
(D) Dry Ice