Class 12 Chemistry Eng /Crystal Structure Quiz

• Orthorhombic

• Hexagonal

• Triclinic

• Tetragonal

An example of network solid is?

• P4(s)

• BN

• Cu

• ZnS

The substance whose crystalline form is quartz, is?

• Silicon

• Sodium silicate

• Silicon carbide

• Silica

After melting quartz if it is cooled very rapidly, what is formed?

• A polycrystalline substance

• A solid with a different crystalline structure

• An amorphous solid

• A colloidal substance

In which of the following cases the example as mentioned does not refer the correct match ?

• Molecular solid: solid SO2

• Covalent solid: SiC

• Metallic solid: Mg

• Ionic solid: quartz

Of the crystal systems given below, which one has more than one Bravais lattices?

• Triclinic

• Monoclinic

• Rhombohedral

• Hexagonal

Which one of the following comments about quartz is true?

• It is anisotropic

• It is a supercooled liquid with high viscosity

• It melts over a range of temperature

• All are true

In which case, the constituent particles in both solids are held together by the forces of same nature?

• Solid CHCl3, FeO

• Diamond, FeO

• Diamond, Quartz

• FeO, Quartz

If an fcc unit cell has a volume of x cc, then the volume occupied by the particles in the unit cell is ?

• 3x
• 2x
• 0.5x
• 0.74 x

The total number of unit cells present in 58.5 g of NaCl is approximately?

• 6.022 x 10^23

• 1.505 x 10^23

• 6.022 x 10^22

• 3.0115 x 10^23