Deck 6: Carbon Nanotubes and Graphite

Question 1

CNT can store                    

A)nitrogen
B)carbondioxide
C)hydrogen
D)peroxides

Answer 1

hydrogen

Question 2

CNT can be used for coating and absorption on the surface                

A)fibre
B)design
C)stains
D)marks

Answer 2

fibre

Question 3

A spray of CNT mixture on ceramic coatings gives the ability to resist                  

A)stains
B)damage
C)smoothness
D)clearness

Answer 3

damage

Question 4

The current used in the arc discharge method is about                    

A)100ma
B)200ma
C)300ma
D)400ma

Question 5

The carbon contained in the negative electrode sublimates.

Question 6

The substrate is heated to                  

A)200c
B)300c
C)400c
D)700c

Question 7

A solid that offers no-------------------passage of electricity is called super conductors.

A)conductance
B)inductance
C)resistance
D)impedance

Question 8

The phenomena of super conductors was first discovered by                        

A)kammerlingh onnes
B)neils bohr
C)richard smalley
D)otto lehman

Question 9

The earliest superconductors to be studied elaborately is                  

A)niobium alloy
B)copper alloys
C)steel alloys
D)iron alloy

Question 10

The shifting of electrons in super conductors is prevented by                    

A)quantum effect
B)threshold energy level
C)energy barrier
D)orbitals

Question 11

The normal metal passes into super conducting state at                        

A)high temperature
B)low temperature
C)critical temperature
D)no temperature

Question 12

Based on magnetic response super conductors are of----------------types.

A)1
B)2
C)3
D)4

Question 13

The ideal super conductors exhibit

A)meissner effect
B)mesmeric effect
C)mesomeric effect
D)monomeric effect

Question 14

This functions as a super conductor at a critical temperature of                  

A)30ok
B)60ok
C)90ok
D)120ok

Question 15

The constituents of this material that is yttrium, barium and copper are in

A)1:1:1
B)1:2:2
C)1:2:3
D)1:2:1

Question 16

Annealing the homogeneous mixture to room temperature to retain its                      

A)composition
B)structure
C)its properties
D)composition, structure and its properties

Question 17

Graphite has layered-----------------structure.

A)three dimensional structure
B)pyramidal
C)planar
D)bipyramidal

Question 18

Bonding between the layers is                    

A)strong
B)weak
C)very tightly bonded
D)not bonded

Question 19

The graphite is--------------anisotropic.

A)highly
B)lightly
C)not
D)very less

Question 20

In oxygen containing atmospheres, the graphite readily converted into                    

A)carbon-monoxide
B)carbondioxide
C)carbonmonosulphide
D)carbon-disulphide

Question 21

Graphite is used in the arc lamp electrode.

Question 22

The graphite undergoes-----------------corrosion in stainless steel.

A)microbial corrosion
B)crevice corrosion
C)pitting corrosion
D)high temperature corrosion

Question 23

The graphite is                      

A)paramagnetic
B)diamagnetic
C)ferromagnetic
D)ferrimagnetic

Question 24

Graphite is also called as                  

A)white lead
B)black lead
C)white coal
D)black coal