What are the basic particles of ice crystals?
  • atoms
  • anions
  • cations
  • molecules
Which of the following solid is isotropic?
  • Ionic
  • Amorphous
  • Metallic
  • Molecular
In which of the following solids, ions of opposite charges are held together by strong electrostatic forces of attraction?
  • Metallic solids
  • Ionic solids
  • Non metallic solids
  • Covalent solids
Why some of the physical properties of solids show different values when measured along different directions in the same crystals?
  • Because solid crystals are anisotropic.
  • Because solid crystals have short bond distances.
  • Because solid crystals are isotropic.
  • Because solid crystals are rigid.
Which of the following crystalline solids have highest melting point?
  • diamond
  • zinc
  • sulphur
  • ice
Which of the following is NOT a property of an amorphous solid?
  • They do not have definite heat of fusion.
  • They are isotropic in nature.
  • They are known as super cooled liquids
  • They have a sharp melting point.
Why ancient glass becomes milky?
  • On ageing refractive index changes.
  • On ageing cracks develop.
  • On ageing amorphous nature increases.
  • On ageing crystallization occurs.
Which of the following is NOT a molecular solid?
  • Solid SO2
  • Solid CO2
  • HCl
  • Diamond
Amorphous solids are also known as
  • Isotropic and super cooled liquids
  • Isoenthalpic and superheated liquids
  • Anisotropic and super cooled liquids
  • Isotropic and superheated solids
Hydrogen bonding occurs in which type of crystalline solids?
  • Molecular solids
  • Ionic solids
  • Network solids
  • Metallic solids
Which of the following is an amorphous solid?
  • Salt
  • Glass
  • Graphite
  • Diamond
Which of the following solids are also called as super cooled liquids?
  • Metallic solids
  • Crystalline solids
  • Covalent solids
  • Amorphous solids
Potassium chloride is:
  • Molecular solid
  • Ionic solid
  • Metallic solid
  • Covalent solid
Which type of solids are held by weak dispersion forces?
  • Non polar molecular solids
  • Covalent solids
  • Metallic solids
  • Polar molecular solids
Zinc sulphide is crystalline solid:
  • Because of periodicity in definite arrangement of particles.
  • Because of large number of particles.
  • Because of non periodicity in arrangement of particles.
  • Because of scattering particles.
Which state of matter is incompressible?
  • gas
  • vapours
  • solid
  • liquid
Why do metallic solids conducts electricity?
  • Due to closely packed positive ions.
  • Due to loosely bounded particles.
  • Due to free or delocalised electrons. correct
  • Due to close packing of negative charge.
Dry ice is an example of:
  • ionic solid
  • covalent solid
  • metallic solid
  • molecular solid
What are the basic constituent particles forming diamond crystals?
  • Molecules
  • Cations
  • Anions
  • Atoms
The crystalline solids are:
  • Enantiotropic
  • Atropic
  • Isotropic
  • anisotropic
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