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. Permanent hardness of water can be removed by adding
  2. Which of the following elements is a metal
  3. The element present in the largest amount in rocks and minerals is
  4. The fastest-running terrestrial animal is
  5. Water has maximum density at
  6. The oxide of Nitrogen used in medicine as anaesthetic is
  7. The metal that is present in Photo Films is
  8. Rust is
  9. Liquefied Petroleum gas (LPG) consists of mainly
  10. The solar eclipse occurs when
  11. According to Daltons atomic theory the smallest particle which can exist independently is
  12. Which of the following is in liquid form at room temperature ?
  13. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  14. What is the unit for measuring the pitch or frequency of sound ?
  15. Bromine is
  16. The smallest functional and structural unit of kidney is called as
  17. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
  18. The metal used in storage batteries
  19. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  20. The most important ore of Aluminium is
  21. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  22. The removal of top soil by water or wind is called
  23. Which of the following characters is not shown by hydrogen
  24. One fathom is equal to
  25. Cell membrane is
  26. Which of the following is the lightest metal ?
  27. In an atomic nucleus, neutrons and protons are held together by
  28. The speed of light with the rise in the temperature of the medium
  29. Lightening cause rainfall because
  30. Which of the following is commonly called a polyamide ?