Chapter 1 : INTRODUCTION TO NANOTECHNOLOGY

Choose Appropriate Alternative

1. 10 nm = _____ m
   

   [A] 10-8 [B] 10-7 [C] 10-9 [D] 10-10

2. The size of nanoparticles is between _____ nm.
   

   [A] 100 to 1000 [B] 0.1 to 10 [C] 1 to 100 [D] 0.01 to 1

3. The diameter of hydrogen atom is...
   

   [A] 1 [B] 10 [C] 0.1 [D] 0.01

4. Carbon atoms make ____ type of bond with other carbon atoms.
   

   [A] covalent [B] ionic [C] metallic [D] hydrogen

5. Fullerene or bucky ball is made up of ____ carbon atoms.
   

   [A] 100 [B] 20 [C] 75 [D] 60

6. The thermal conductivity of a standard SWNT along its length is ____ watt/(m.K)
   

   [A] 3500 [B] 385 [C] 35000 [D] 35

7. 1 m = _____ nm.
   

   [A] 10-9 [B] 10-8 [C] 109 [D] 108

8. "There is plenty of room at the bottom." This was stated by _____.
   

   [A] Eric Drexler [B] Richard Feynmann [C] Harold Croto [D] Richard Smalley

9. Who coined the word 'nanotechnology'?
   

   [A] Eric Drexler [B] Richard Feynmann [C] Sumio Tijima [D] Richard Smalley

10. According to the definition by CRN, nanotechnology is...
    

    [A] mechanical engineering [B] atomic engineering 
    [C] Newtonian mechanics    [D] micro-electronics

11. Nanoscience can be studied with the help of...
    

    [A] quantum mechanics [B] Newtonian mechanics [C] macro-dynamics [D] geophysics

12. Greeks and Romans had used nanoparticles in the manufacture of...
    

    [A] cosmetics for eyes [B] medicines [C] metal articles [D] hair-dye

13. Egyptians were using ____ to prepare make-up for eyes.
    

    [A] nanoaluminium [B] nanocopper [C] nanosteel [D] nanolead

14. The sword of Tipu Sultan was made of...
    

    [A] nanolead [B] nanoaluminium [C] Damascus steel [D] Pure iron

15. _____ contains nanoparticles prepared by using biologically processed metal ores.
    

    [A] Homeopathic medicines [B] Modern antibiotics 
    [C] Ayurvedic 'Bhasmas'  [D] Modern cosmetics

16. Who was the first scientist to describe that substances having nanodimensions possess altogether different and unique properties?
    

    [A] Richard Feynmann [B] Eric Drexler [C] Archimedes [D] Michael Faraday

17. Which of the following does not apply to nanotechnology?
    

    [A] It is a general-purpose technology.  [B] It can be called Green technology.
    [C] Newtonian mechanics can describe it. [D] It involves rearrangement of atoms.

18. The diameter of human hair is ____ nm.
    

    [A] 50,000 [B] 75,000 [C] 90,000 [D] 1,00,000

19. The diameter of human hair is ____ m.
    

    [A] 5 x 10-8 [B] 5 x 10-7 [C] 5 x 10-6 [D] 5 x 10-5

20. The cut-off limit of human eye is ____ nm.
    

    [A] 2,000 [B] 5,000 [C] 10,000 [D] 50,000

21. The size of E.Coli bacteria is ____ nm.
    

    [A] 2,000 [B] 5,000 [C] 50 [D] 90

22. The size of RBC is ____ nm.
    

    [A] 50 [B] 90 [C] 2,000 [D] 5,000

23. The thickness of a transistor is ____ nm.
    

    [A] 50 [B] 90 [C] 2,000 [D] 5,000

24. The size of a virus is ____ nm.
    

    [A] 2 [B] 20 [C] 50 [D] 2000

25. The diameter of a bucky ball is ____ nm.
    

    [A] 1,000 [B] 100 [C] 10 [D] 1

26. The width of a typical DNA molecule is ____ nm.
    

    [A] 1 [B] 2 [C] 5 [D] 10

27. 1 micrometer (micron) = ______ m.
    

    [A] 10-9 [B] 10-8 [C] 10-7 [D] 10-6

28. 1 micrometer (micron) = ______ nm.
    

    [A] 1,000 [B] 100 [C] 10 [D] 0.01

29. The full form of STM is...
    

    [A] Scanning Tunneling Microscope   [B] Scientific Technical Microscope 
    [C] Systematic Technical Microscope[D] Super Tensile Microscope

30. What does 'F' stand for in AFM?
    

    [A] Fine [B] Front [C] Force [D] Flux

31. Which ratio decides the efficiency of nanosubstances?
    

    [A] Weight/volume [B] Surface area/volume [C] Volume/weight [D] Pressure/volume

32. The surface area to volume ratio of a sphere with radius 1 cm is R₁ and that of a sphere with radius 5 cm is R₂. Then R₁ = ____ R₂.
    

    [A] 3 [B] 1/3 [C] 5 [D] 1/5

33. The surface area to volume ratio of a cube with side 1 unit is R₁ and that of a cube with side 10 units is R₂. Then R₂ = ____ R₁.
    

    [A] 1/10 [B] 10 [C] 1/100 [D] 100

34. The two important properties of nanosubstances are...
    

    [A] pressure and friction     [B] sticking and friction 
    [C] sticking and temperature [D] temperature and friction

35. With the help of _____, Robert F. Curl and others discovered fullerene.
    

    [A] electron microscope     [B] magnetic resonance 
    [C] condensation technique [D] mass spectrograph

36. In the structure of fullerene each carbon atom forms covalent bonds with ____ other carbon atoms.
    

    [A] one [B] two [C] three [D] four 

37. Who had invented the famous 'Geodesic' dome structure?
    

    [A] Eric Drexler [B] Buckminster Fuller [C] Richard Smalley [D] Faraday

38. The largest cluster of carbon atoms in Bucky balls known till today consists of ____ carbon atoms.
    

    [A] 60 [B] 75 [C] 180 [D] 540

39. The smallest cluster of carbon atoms in Bucky balls known till today consists of ____ carbon atoms.
    

    [A] 75 [B] 60 [C] 20 [D] 15

40. The tensile strength of an MWNT is ____ Pa.
    

    [A] 63 x 106 [B] 63 x 107 [C] 63 x 108 [D] 63 x 109

41. The compressive strength of a nanotube _____ its tensile strength.
    

    [A] is less than [B] is greater than [C] is equal to [D] may be greater than

42. The hardness of a standard SWNT is ____ Pa.
    

    [A] 63 x 106 [B] 25 x 106 [C] 25 x 109 [D] 25 x 10-9

43. The bulk modulus of a standard SWNT is ____ that of diamond.
    

    [A] less than [B] greater than [C] equal to [D] less than or equal to

44. How much current can be passed through 1 cm² cross-section of a metal nanotube?
    

    [A] 10-9 A [B] 109 A [C] 1000 A [D] 0.001 A

45. The electrical conductivity of a nanotube is ____ times that of copper.
    

    [A] 10 [B] 100 [C] 1000 [D] 1/100

46. An MWNT possesses electrical superconductivity up to temperature of...
    

    [A] 12 K [B] 12°C [C] 100 K [D] 100°

47. At room temperature, the thermal conductivity of a copper wire is ____ watt/(m.K).
    

    [A] 3500 [B] 350 [C] 385 [D] 38.5

48. In radial direction, the thermal conductivity of a nanotube is ____ watt/(m.K).
    

    [A] 3500 [B] 385 [C] 350 [D] 0

49. The thermal stability of a nanotube is seen up to ____ K in vacuum.
    

    [A] 100 [B] 1000 [C] 2200 [D] 3100

50. The thermal conductivity of an SWNT along length is ____ watt/(m.K).
    

    [A] 35 [B] 350 [C] 385 [D] 3500

51. The size of a quantum dot is ____ nm.
    

    [A] 5 [B] 10 [C] 50 [D] 100

52. The wavelength of visible light is ____ nm.
    

    [A] 40-70 [B]  400-700 [C] 4000-7000 [D] 40000-70000

53. The capacity of a normal human eye to see the smallest object is ____ μm.
    

    [A] 10000 [B] 1000 [C] 100 [D] 10

54. The width of a carbon nanotube is ____ nm.
    

    [A] 1 [B] 1.3 [C] 2.5 [D] 10

55. The thermal stability of a nanotube is seen up to ____ K in air.
    

    [A] 100 [B] 1000 [C] 2000 [D] 3100

56. Nanoparticles of which substance were found on the surface of the sword of Tipu Sultan?
    

    [A] Gold [B] Lead [C] Carbon [D] Silicon

57. Nano particles of which atom are used to control collateral damage due to explosion?
    

    [A] Copper [B] Aluminium [C] Carbon [D] Lead

58. Who prepared and explained nanotubes for the first time?
    

    [A] Sumio Tijima [B] Richard Smalley [C] Eric Drexler [D] Richard Feynmann

59. Which of the following statement/s is are true?
    
    1. Volume to surface area ratio is very large for nanomaterials.
    2. The cut-off limit of human eye is 10^-5 m.
    3. Hardness of a SWNT is about 63 x 10⁹ Pa.
    4. Carbon nanotubes are cylindrical fullerenes.
    
    

    [A] All four [B] (ii) and (iv) [C] (i), (ii) and (iv) [D] (ii), (iii) and (iv)

60. Match the objects in Part A with their size in Part B.
    
    
    
    

    [A] 1-a, 2-c, 3-d, 4-b [B] 1-b, 2-a, 3-c, 4-d
    [C] 1-a, 2-d, 3-b, 4-c [D] 1-c, 2-d, 3-b, 4-a

61. Match the items in Part A with appropriate alternative in Part B.
    
    
    
    

    [A] 1-c, 2-d, 3-a [B] 1-c, 2-b, 3-a [C] 1-c, 2-a, 3-b [D] 1-a, 2-b, 3-d

62. The suffix '-ene' in the name of fullerene shows the presence of _____ in the molecule.
    

    [A] one triple bond [B] one double bond [C] two single bonds [D] two triple bonds

ANSWERS

(1) A (2) C (3) C (4) A (5) D (6) A (7) C (8) B (9) A (10) B (11) A (12) D (13) D (14) C (15) C (16) D (17) C (18) A (19) D (20) C (21) A (22) D (23) B (24) C (25) D (26) B (27) D (28) A (29) A (30) C (31) B (32) C (33) A (34) B (35) D (36) C (37) B (38) D (39) C (40) D (41) A (42) C (43) B (44) B (45) C (46) A (47) C (48) D (49) D (50) D (51) A (52) B (53) D (54) B (55) B (56) C (57) B (58) A (59) D (60) C (61) C (62) B