Q: Which microorganism is responsible for Dengue fever?

A: Viruses


Q: Helium is preferred to hydrogen in air balloons because it:

A: does not form an explosive mixture with air


Q: Ozone layer is situated in the upper regions of

A: Stratosphere


Q: What does the term Dolby B or Dolby C printed on tape recorders and other sound systems refer to?

A: noise reduction circuit


Q: Pure water freezes at a temperature:

A: 32°F


Q: A vitamin requires cobalt for its activity. The vitamin is:

A: Vitamin B12


Q: In which direction a rainbow is formed ?

A: Opposite to the sun


Q: What happens to a person who receives the wrong type of blood?

A: the RBCs agglutinate


Q: Which of the following blood group is considered as Universal Donor ?

A: O


Q: Which one of the following animals is not "warm-blooded"?

A: Toad

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