Deck 4: Nanotechnology and Surface Mount Technology: Properties, Preparation, and Applications

Question 1

What is the advantage of using Surface Mount Technology?

A)all of the mentioned
B)low power consumption
C)reduces heat dissipation in components
D)use leaded or leadless components

Answer 1

use leaded or leadless components

Question 2

Which of the following is an example of top- down approach for the preparation of nanomaterials?

A)gas phase agglomeration
B)molecular self-assembly
C)mechanical grinding
D)molecular beam epitaxy

Answer 2

mechanical grinding

Question 3

Which of the following is an example of bottom-up approach for the preparation of nanomaterials?

A)etching
B)dip pen nano-lithography
C)lithography
D)erosion

Answer 3

dip pen nano-lithography

Question 4

The properties like melting point, solubility, color, etc changes on varying the                        

A)size
B)composition
C)surface properties
D)none of the mentioned

Question 5

The properties like dispersibility, conductivity, etc changes on varying the

A)size
B)composition
C)surface properties
D)none of the mentioned

Question 6

Quantum confinement results in

A)energy gap in semiconductor is proportional to the inverse of the square root of the size
B)energy gap in semiconductor is proportional to the inverse of the size
C)energy gap in semiconductor is proportional to the square of size
D)energy gap in semiconductor is proportional to the inverse of the square of size

Question 7

Which of the following is the principal factor which causes the properties of nanomaterials to differ significantly from other materials?

A)size distribution
B)specific surface feature
C)quantum size effects
D)all of the mentioned

Question 8

Select the incorrect statement from the following options.

A)self-assembly is a top-down manufacturing technique
B)in self-assembly, weak interactions play very important role
C)self-assembling molecules adopt an organised structure which is thermodynamically more stable than the single, unassembled components
D)compared to the isolated components, the self-assembled structure has a higher order

Question 9

Which of the following is the application of nanotechnology to food science and technology?

A)agriculture
B)food safety and biosecurity
C)product development
D)all of the mentioned

Question 10

What are the advantages of nano-composite packages?

A)lighter and biodegradable
B)enhanced thermal stability, conductivity and mechanical strength
C)gas barrier properties
D)all of the mentioned

Question 11

The efficiency of today's best solar cell is about                        

A)15-20%
B)40%
C)50%
D)75%

Question 12

The configuration of Buckminsterfullerene is

A)12 hexagons and 22 pentagons
B)18 hexagons and 15 pentagon
C)20 hexagon and 12 pentagon
D)15 hexagon and 15 pentagon

Question 13

C₆₀ is soluble in                          

A)water
B)ammonia
C)hcl
D)benzene

Question 14

CNTs stands for                          

A)carbon nanotubes
B)carbon nanotechnology
C)carbon nanoscience and technology
D)carbon nine technology

Question 15

CNTs are capped on both ends with which carbon nanostructure?

A)graphite
B)diamond
C)c₆₀
D)benzene

Question 16

The metallic tubes have which kind of structure?

A)armchair
B)chiral
C)boat
D)achiral

Question 17

The carbon tubes have high conductivity.

Question 18

Carbon nanotubes display magnetoresistance at low temperature.

Question 19

Identify the process.

A)synthesis of C₆₀
B)synthesis of cnts
C)chemical vapour deposition
D)carbon discharge

Question 20

The main purpose of CNTs in fuel cells is

A)production of energy
B)active medium
C)catalyst
D)storage

Question 21

The figure shows a FET using CNT. Identify CNT.

A)bucky balls
B)soccer balls
C)cricket balls
D)tennis balls

Question 22

The fullerenes are composed with                    

A)graphene sheets
B)graphite
C)lead
D)other carbon materials

Question 23

In fullerenes, the graphene sheets are linked with                  

A)hexagonal rings
B)octagonal rings
C)trigonal rings
D)decagonal rings

Question 24

The smallest bucky ball cluster is                    

A)c₆
B)c₈
C)c₁₀
D)c₂₀

Question 25

Hollow tubes of very small dimensions are called as                            

A)mega tubes
B)carbon nano tubes
C)bucky ball clusters
D)polymers