Top 150+ Solved Fundamentals of NanoScience MCQ Questions Answer
Q. A water cooled surface is used in the process to collect
a. nano particles
b. nano tubes
c. nano spheres
d. nano sheets
Q. 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
Q. 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
Q. 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
Q. Which of the following is used in electron microscope?
a. electron beams
b. magnetic fields
c. light waves
d. electron beams and magnetic fields
Q. 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
Q. Degree of scattering in transmission electron microscope is a function of
a. wavelength of electron beam used
b. number of atoms that lie in the electron path
c. number and mass of atoms that lie in the electron path
d. mass of atoms that lie in the electron path
Q. Negative Staining is used for examining
a. virus particles
b. protein molecules
c. bacterial flagella
d. virus particles, protein molecules and bacterial flagella
Q. Which among the following helps us in getting a three-dimensional picture of the specimen?
a. transmission electron microscope
b. scanning electron microscope
c. compound microscope
d. simple microscope
Q. The secondary electrons radiated back in scanning microscope is collected by?
a. specimen
b. anode
c. vacuum chamber
d. cathode
Q. On what factors do the intensity of secondary electrons depend upon?
a. shape of the irradiated object
b. chemical composition of the irradiated object
c. number of electrons ejected
d. size and chemical composition of the irradiated object, number of electrons ejected and on the number of electrons reabsorbed by surrounding