The speed of light with the rise in the temperature of the medium

A. Increases

B. Remains unaltered

C. Drops sharply

D. Decreases

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  1. The chemial name of Uria is
  2. The oxide of Nitrogen used in medicine as anaesthetic is
  3. What is the unit for measuring the pitch or frequency of sound ?
  4. Which of the following elements is non-radioactive?
  5. Brass gets discoloured in air due to the presence of which gas in air
  6. The metal used in storage batteries
  7. The hardest substance available on earth is
  8. Pollination by birds is called
  9. The most important ore of Aluminium is
  10. The speed of light with the rise in the temperature of the medium
  11. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  12. Lightening cause rainfall because
  13. Water has maximum density at
  14. Glass is made from the mixture of
  15. Polythene is industrially prepared by the polymerisation of
  16. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  17. The marine animal called dugong which is vulnerable to extinction is a/an
  18. Quartz crystals normally used in quartz clocks etc. is chemically
  19. One fathom is equal to
  20. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  21. The intencity of Earthquakes is measured on
  22. The solar eclipse occurs when
  23. Which of the following is the lightest metal ?
  24. Nitrification means
  25. In an atomic nucleus, neutrons and protons are held together by
  26. Which of the following is commonly called a polyamide ?
  27. The fastest acting enzyme in the biological kingdom is
  28. The type of glass used in making prisms and lenses is
  29. Apparatus invented by Archimedes is :
  30. The major ingredient of leather is