Process Calculations GATE-1993
Q 1: 1000 kg of a solution containing 50 % by weight of a salt dissolved in it is cooled. 400 kg of anhydrous salt is separated out. The solubility of the salt at the lower temperature in kg/100 kg of water is
Q 2: Methane is completely burned with air. The possible volume percent of carbon dioxide (on dry basis) in the flue gases is
Q 3: Iron pyrite (FeS2) is burned with air in 100 % excess of that required to oxidize all iron to Fe2O3 and all sulfur to sulfur dioxide. Calculate the composition of exit gases, if 80 % of sulfur is oxidized to sulfur trioxide and the rest to sulfur dioxide. All iron is oxidized to Fe2O3.