Re-Quiz1 SSP (Amirul)

In primitive cells the lattice points are ________.

• Only inside the cell

• Only at the corners

• Either one point inside the cell or only at the corner

• Neither inside the cell nor at the corners

Which of the following is incorrect?

• Lattice + Basis = Crystal

• All Units cells are Primitive Cells

• Crystals are formed in great heat and under pressure

• Crystals are formed in great heat and under pressure

Guess the type of unit cell

• Primitive

• Non-Primitive

The count of nearest neighbours in a crystal lattice is called

• Unit cell

• Void

• Packing Efficiency

• Coordination Number.

• Orthorhombic
• Cubic
• Tetragonal
• Hexagonal

Number of atoms per unit cell in FCC lattice are

• 4

• 1

• 2

• 6

The correct order of the packing efficiency in different types of unit cells is

• Simple Cubic < Body Centered Cubic < Face Centered Cubic

• Body Centered Cubic < Face Centered Cubic < Simple Cubic

• Face-centered cubic < Simple cubic < Body-centered cubic

• Simple cubic < Face-centered cubic < Body-centered cubic

A family of plane directions is represented by:

• [hkl]

• (hkl)

• <hkl>

• {hkl}

In a cubic crystal, a given plane intercepts the axes at 3a, 3b, c. The Miller Indices of the plane are?

• [1 1 9]

• [1 1 3]

• [3 3 1]

• [9 9 1]

If a Miller Index is zero, the plane is

• parallel to that axis

• perpendicular to that axis

• non-existent