Among the various allotropes of carbon,

  1. Home

Question:
  Among the various allotropes of carbon,

1.coke is the hardest, graphite is the softest

2.diamond is the hardest, coke is the softest

3.diamond is the hardest, graphite is the softest

4. diamond is the hardest, lamp black is the softest

Posted Date:-2021-03-07 10:30:36

More MCQS Questions and answers

  1. Air is a/an
  2. Among the various allotropes of carbon,
  3. Balloons are filled with
  4. Bell metal is an alloy of
  5. From which mineral is radium obtained?
  6. Heavy water is
  7. In fireworks, the green flame is produced because of
  8. In which of the following activities silicon carbide is used?
  9. Marsh gas is
  10. Potassium Permanganate is used for purifying drinking water, because
  11. Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
  12. Tetraethyl lead is used as
  13. The hardest substance available on earth is
  14. The variety of coal in which the deposit contains recognisable traces of the original plant material is
  15. Carbon, diamond and graphite are together called
  16. Non stick cooking utensils are coated with
  17. Permanent hardness of water may be removed by the addition of
  18. Sodium metal is kept under
  19. The gases used in different types of welding would include
  20. The main constituents of pearls are
  21. Which of the following is not an isotope of hydrogen?
  22. Actinides are the elements with atomic numbers from
  23. Amalgams are
  24. Bromine is a
  25. Chemical formula for water is
  26. Chlorophyll is a naturally occurring chelate compound in which central metal is
  27. Galvanised iron sheets have a coating of
  28. Brass gets discoloured in air because of the presence of which of the following gases in air?
  29. LPG consists of mainly
  30. Monazite is an ore of
  31. Most soluble in water is
  32. Permanent hardness of water can be removed by adding
  33. Potassium nitrate is used in
  34. Quartz crystals normally used in quartz clocks etc. is chemically
  35. Soda water contains
  36. The average salinity of sea water is
  37. The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
  38. The element common to all acids is
  39. The filament of an electric bulb is made of
  40. The gas usually filled in the electric bulb is
  41. The group of metals Fe, Co, Ni may best called as
  42. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
  43. The most important ore of aluminium is
  44. The property of a substance to absorb moisture from the air on exposure is called
  45. The two elements that are frequently used for making transistors are
  46. Washing soda is the common name for
  47. Water is a good solvent of ionic salts because
  48. What is laughing gas?
  49. When an iron nail gets rusted, iron oxide is formed
  50. Which metal pollute the air of a big city?
  51. Which of the following are the ingredients of gun metal?
  52. Which of the following does not contain a coinage metal?
  53. Which of the following is a non metal that remains liquid at room temperature?
  54. Which of the following is an element?
  55. Which of the following is in liquid form at room temperature?
  56. Which of the following is the lightest metal?
  57. Which of the following is used as a lubricant?
  58. Which of the following is used in pencils?
  59. Which of the following metals forms an amalgam with other metals?
  60. Which of the following metals remain in liquid for under normal conditions?
  61. Which of the following was to be discovered first in the chromospheres of the sun?
  62. Which of the gas is not known as green house gas?
Search
Olete Team
Online Exam Test Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on Online Exam Test website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!