Solid state

What is the coordination number of BCC?

• 12
• 8
• 6
• 4

The crystal structure of sodium chloride is

• BCC
• FCC
• amorphous
• covalent

Tags

NGSS.HS-PS1-3

What do you call this structure?

• FCC
• BBC
• BCC
• CC

CsBr has b.c.c. structure with edge length 4.3 A. The shortest inter ionic distance in between Cs⁺ and Br^– is:

• 3.72

• 1.86

• 7.44

• 4.3

In a ccp (close packed structure) of mixed oxides, it is found that lattice has O^2– (oxide ions), and one-half of octahedral voids are occupied by trivalent cations (A³⁺) and one-eighth of tetrahedral voids are occupied by divalent cations (B²⁺). Derive formula of the mixed oxide.

• ABO₃

• A₂BO₄

• A₃BO₄

• AB₂O₄

The addition of CaCl₂ crystal to a KCl crystal

• Lower the density of the KCl crystal

• Raises the density of the KCl crystal

• Does not affect the density of the KCl crystal

• Increases the Frenkel defects of KCl crystal

Percentage of free space in a body centered cubic unit cell is

• 32%

• 34%

• 28%

• 20%

An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of faces of the cube. The empirical formula of the compound would be

• AB

• A2B

• A3B

• AB3

A solid compound contains X, Y and Z atoms in a cubic lattice with X atoms occupying the corners, Y atoms in the body centred position and Z atoms at the centres of faces of the unit cell. What is the empirical formula of the compound?

• XY2Z3

• XYZ

• XYZ3

• X2YZ3

In both HCP and CCP the coordination number is

• 12

• 6

• 4

• 10