Chemistry of Materials

The band gap between the valence band and conduction band is the measure of ______

• a) The conductivity of the material

• b) The resistivity of the material

• c) Charge density

• d) Ease of ionization

Insulation breakdown may occur at _______

• a) High temperature

• b) Low temperature

• c) At any temperature

• d) Depends on pressure

Current carrier in conductors is ____

• a) Proton

• b) Electron

• c) Neutron

• d) Positron

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which of the following is not an application of conducting polymers?

• a) Electronics

• b) Rechargeable batteries

• c) Analytical sensors

• d) Adhesives

Conducting polymers having conjugation is a type of intrinsically conducting polymers.

• a) True

• b) False

Select the incorrect statement from the following option.

• a) Conductive element filled polymer are mechanically durable and strong

• b) Conductive element filled polymer possess good bulk conductivity

• c) Conductive element filled polymer are generally high in cost

• d) Conductive element filled polymer are light in weight

Tags

NGSS.HS-PS2-6

Which property that polyacetylene exhibits is unusual for an organic polymer?

• Solubility

• Flexibility

• Electrical conductivity

• High boiling point

The conducting mechanism is polyacetylene can be explained by

• polaron hopping mechanism

• bipolaron hopping mechanism

• Hopping conduction mechanism

• Conduction mechanism

Tags

NGSS.HS-PS3-5

Which of its properties makes graphene such an amazing material?

• Thermal conductivity

• Mechanical strength

• Electron mobility

• All of the above

Oxidizing agent used in the synthesis of graphite oxide is_______

• K₂Cr₂O₇

• KMnO₄

• HClO₄