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Diamond shines because of its

A. purity

B. hardness

C. high density

D. high refractive index and low critical angle

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  1. Isotones are species of atoms containing
  2. Heat is transmitted from one end of a metal rod to its other end by the method of
  3. The speed of light is minimum while passing through
  4. Fish and other aquatic creatures can live inside a deep frozen pond because
  5. The instrument used to measure atmospheric pressure is
  6. The evaporation rate depends on
  7. One finds it more difficult to walk on ice than on a concrete road because
  8. A proton is
  9. A balloon ruled with hydrogen will
  10. In a hydraulic pressure
  11. Choose the scalar quantity from the following physical quantities
  12. Of the following types of electromagnetic radiation which has the longest wavelength?
  13. The focal length or lens or the eye is under the control or the
  14. Choose the correct answer
  15. In compact porous soil, the rising of the water is due to
  16. When light passes from air to glass, its velocity in glass
  17. When a steel ball is placed on the surface of mercury, it does not sink because
  18. We cannot see and without the aid of a telescope
  19. The hygrometer is an apparatus used for finding the
  20. An electric charge is measured in
  21. A transformer
  22. Every action has an equal and opposite reaction is Newton's law of Motion
  23. The acoustical quality of a room depends on
  24. The mode of travel of heat energy from the sun across the empty space beyond the earth's atmosphere…
  25. Mercury is used in thermometers because
  26. The planet that moves fastest around the sun is
  27. Galaxies emit
  28. Which of the following revolves round the nucleus in an atom?
  29. A photon is
  30. An electric kettle used for boiling hard water has a white scale deposited on its heating element. This…