Materials Science & Molecular Engineering

Question 1

How many times stronger than steel is graphene?

Accepted Answer

100-300 times

Answer

10 times

Answer

50 times

Answer

1000 times

Question 2

What is the primary structural advantage that allows graphene to conduct electricity better than copper?

Accepted Answer

Hexagonal lattice with exceptional electron mobility

Answer

Higher electron density

Answer

Lower atomic weight

Answer

Increased thickness

Question 3

What application uses graphene sensors to detect volatile organic compounds and toxic gases?

Accepted Answer

Gas sensing technology

Answer

Food packaging

Answer

Building insulation

Answer

Water purification

Question 4

How is graphene conceptually related to diamond and graphite?

Accepted Answer

They are all carbon allotropes with different atomic arrangements

Answer

They are different elements

Answer

Graphite is made from graphene

Answer

They have identical crystal structures

Question 5

What is the thermally-insulating property of graphene due to?

Accepted Answer

Its exceptional thermal conductivity (5,300 W·m⁻¹·K⁻¹)

Answer

Its thinness

Answer

Its hexagonal structure

Answer

Its opacity

Question 6

What biomaterial application uses graphene for drug delivery and tissue scaffolding?

Accepted Answer

Biomedical implants and tissue engineering

Answer

Surgical instruments

Answer

Blood transfusions

Answer

Bone marrow extraction

Question 7

What property makes fullerenes (C60 buckyballs) unique among carbon allotropes?

Accepted Answer

They are spherical cage structures with exceptional stability

Answer

They conduct electricity like graphite

Answer

They are harder than diamond

Answer

They dissolve in water

Question 8

What technique can create perfectly layered graphene materials for advanced electronics?

Accepted Answer

All of the above

Answer

Mechanical exfoliation

Answer

Chemical vapor deposition

Answer

Electrochemical synthesis

Question 9

What is a limitation of graphene for widespread industrial applications?

Accepted Answer

High-quality large-scale production remains challenging

Answer

It is too heavy

Answer

It is easy to produce in large quantities

Answer

It degrades quickly

Question 10

What property allows some carbon nanotubes to be stronger than steel yet lighter than aluminum?

Accepted Answer

Their hexagonal carbon structure with seamless bonding throughout

Answer

Their density is near zero

Answer

They are hollow

Answer

They are made of diamond

Materials Science & Molecular Engineering

How many times stronger than steel is graphene?

Publisher

Materials Science & Molecular Engineering