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Lightening cause rainfall because

A. It activate H2O molecule

B. Photo-electricity reaction starts

C. Some of the gas molecules become bigger

D. It cause combination of oxygen and nitrogen

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  1. Epoxy resins is used as
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  3. The solar eclipse occurs when
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  5. The hardest substance available on earth is
  6. The type of glass used in making prisms and lenses is
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  18. The speed of light with the rise in the temperature of the medium
  19. The metal that is present in Photo Films is
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  21. Which of the following elements is a metal
  22. The marine animal called dugong which is vulnerable to extinction is a/an
  23. The formula of Plaster of Paris is
  24. The fastest-running terrestrial animal is
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