The water in the springs of west Virginia University of America has a temperature upto `60^@C` and pH of 1-2. Do you know if any living organism could exist in this water? Give your justification.

An ice box made of Styrofoam (Thermal conductivity = 0.01 J m ^(-1) s ^(-1) K ^(-1)) is used to keep liquids cool. It has a total wall area including lid of 0.8 m^(2) and wall thickness of 2.0 cm. A bottle of water is placed in the box and filled with ice. If the outside temperature is 30°C the rate of flow of heat into the box is : (in J-s ^(-1) ):

a) Name the following: 1) A water soluble vitamin 2) An oil soluble vitamin 3) A vitamin which is neither soluble in water nor is fat 4) The disease caused. by deficiency of vitamin 'B1' 5) The diseases caused by deficiency of vitamin C' b) What do you understand by avitaminosis?