Answer / murthy

iodine value is gms of iodine absorbed per 100 gms of spent
carbon.it indicate the degree of unsaturation.iodine value
high indicates carbon has high absoption capacity and
viceversa.

Answer / baskar

Iodine value is the milligrams of iodine consumed or
absorbed per gram of carbon.It is used to determine the
adsorption power of carbon.

More the iodine value more is the adsorption and viceversa.
For fresh carbon iodine value is more than 1000 and for
spent carbon it is less than 500.The more the value is low
it means that it is used effectively.

Question 50 - An aqueous solution with 2.5 g of a protein dissolved in 600 cubic centimeters of a solution at 20 degree Celsius was placed in a container that has a water-permeable membrane. Water permeated through the membrane until the h - level of the solution was 0.9 cm above the pure water. (a) Calculate the absolute temperature of the solution, T in Kelvin, where T (Kelvin) = T (degree Celsius) + 273.15. (b) Calculate the osmotic pressure, P of the solution by using the formula P = hrg where h is level of the solution, r is density of water with 1000 kg per cubic meter, g = 9.81 N / kg as gravitational acceleration. (c) Calculate the concentration of the protein solution, C in kg / cubic meter. (d) Calculate the molecular weight of the protein, (MW) = CRT / P where R = 8.314 Pa cubic meter / (mol K) as ideal gas constant.

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