Deck 7: Nano Materials and Crystallography Techniques

Question 1

Natural graphite is mostly used in

A)refrigerators
B)laboratories
C)catalyst
D)fuel

Answer 1

refrigerators

Question 2

For high sensitivity or selectivity environmental sensors to sense the gaseous chemical like                    

A)co₂
B)no₃
C)o₂
D)no

Answer 2

no

Question 3

The nano materials are used in the light emitted electro luminescence devices.

Answer 3

True

Question 4

The synthesized magnetic nano particles from-------------- have been found to self- arrange automatically.

A)zinc
B)copper
C)iron
D)zirconium

Question 5

The nano particles from iron and palladium are used to produce                  

A)magnets
B)magnetic lens
C)magneto meters
D)magnetic storage devices

Question 6

----------------is the field in which the nano particles are used with silica coated iron oxide iron oxide.

A)magnetic applications
B)electronics
C)medical diagnosis
D)structural and mechanical materials

Question 7

DNA detection through the ------------------ by using the oligonucleotide functionalised gold nano crystals is developed.

A)colorimetric
B)diathermy
C)electro therapy
D)treatment tables

Question 8

Coating the nano crystals with the ceramics is carried that leads to                  

A)corrosion
B)corrosion resistant
C)wear and tear
D)soft

Question 9

The---------------to the ceramics are superior coatings.

A)nano particles
B)nano powder
C)nano crystals coating
D)nano gel

Question 10

----------------of ceramic components are easier through nano structuring.

A)lubrication
B)coating
C)fabrication
D)wear

Question 11

By nano scale distribution of the--------------in matrix improves the life and performance.

A)carbide
B)tungsten
C)hydrides
D)nitrites

Question 12

The extensively used nano particles as catalyst is                   

A)silver
B)copper
C)gold
D)cerium

Question 13

Due to---------------tensile strength some of the nano materials are used in air crafts.

A)high
B)low
C)moderate
D)no

Question 14

Fabrics are extensively made out of nano materials like                        

A)carbon nano tubes
B)fullerenes
C)mega tubes
D)polymers

Question 15

Which of the following variables govern the different X-ray techniques?

A)radiation, sample, detector
B)radiation, diffraction, detector
C)heat, mass, proteins
D)energy, sample, temperature.

Question 16

Which of the following rays are used in the powder method of crystals?

A)gamma rays
B)?-rays
C)?-rays
D)monochromatic x-rays

Question 17

In the powder method, in powder sample various--------------samples are also present in every possible orientation.

A)miller indices
B)lattice
C)unit cell
D)atoms

Question 18

Which of the following method for detecting the diffracted beams in the powder method of crystals?

A)miller method
B)dalton method
C)guinier method
D)stockbarger method

Question 19

Which of the following shapes are formed by the diffracted radiation in the powder method?

A)circular
B)spherical
C)conical
D)cubical

Question 20

During the detection of the cones by the thin strip of film which one of the following statements is appropriate for the cones and the films?

A)cones are parallel to the strip of the films
B)cones are perpendicular to the strip of the films
C)cones intersects the strip of the films
D)cones are vertically placed over the strip of the film

Question 21

What is the disadvantage of the Debye- Scherrer film to obtain the d-spacings?

A)temperature required is too high
B)exposure time is long
C)closely spaced arcs are circular
D)cones formed by the diffracted beams are two heavy in weight

Question 22

A convergent beam is obtained by placing which of the following material between the X- ray source and the sample?

A)soil particles
B)single crystal of carbon
C)linear double crystal of graphite
D)bent single crystal of quartz

Question 23

Which of the following is used in electron microscope?

A)electron beams
B)magnetic fields
C)light waves
D)electron beams and magnetic fields

Question 24

Which of the following are true for electron microscopy?

A)specimen should be thin and dry
B)image is obtained on a phosphorescent screen
C)electron beam must pass through evacuated chamber
D)specimen should be thin and dry, image is obtained on a phosphorescent screen and electron beam must pass through evacuated chamber