In an atomic nucleus, neutrons and protons are held together by

A. Magnetic forces

B. Gravitational forces

C. Coulombic forces

D. Exchange forces

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  1. The metal that is present in Photo Films is
  2. The recent atomic weight scale is based on
  3. Quartz crystals normally used in quartz clocks etc. is chemically
  4. The chemial name of Uria is
  5. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  6. Glass is made from the mixture of
  7. The colour of Emerald is
  8. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
  9. The location and energy of an electron in an atom can be specified by
  10. Which of the following elements is a metal
  11. The marine animal called dugong which is vulnerable to extinction is a/an
  12. The oxide of Nitrogen used in medicine as anaesthetic is
  13. Liquefied Petroleum gas (LPG) consists of mainly
  14. Which of the following is the lightest metal ?
  15. The smallest functional and structural unit of kidney is called as
  16. The Panda belongs to the same family as that of
  17. The element present in the largest amount in rocks and minerals is
  18. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  19. What is the unit for measuring the pitch or frequency of sound ?
  20. The speed of light with the rise in the temperature of the medium
  21. The formula of Plaster of Paris is
  22. Pollination by birds is called
  23. Which of the following characters is not shown by hydrogen
  24. Brass gets discoloured in air due to the presence of which gas in air
  25. The hardest substance available on earth is
  26. The metallic constituents of hard water are
  27. Which of the following elements is obtained from sea weeds ?
  28. In an atomic nucleus, neutrons and protons are held together by
  29. Lightening cause rainfall because
  30. The major ingredient of leather is