Process Calculations GATE-2010

Q 1: A saturated solution at 30 ^oC contains 5 moles of solute (M.W.=50 kg/kmol) per kg of solvent (M.W.=20 kg/kmol). The solubility at 100 ^oC is 10 moles of the solute per kg of the solvent. If 10 kg of the original solution is heated to 100 ^oC. Then the weight of the additional solute that can be dissolved in it, is

A) 0.25 kg
B) 1 kg
C) 2 kg
D) 3.34 kg

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Q 2: The products of the composition of methane in atmospheric air (21 % O₂ and 79 % N₂) have the following composition on a dry basis:

Products	Mole %
CO2	10.00
O2	2.37
CO	0.53
N2	87.10

The ratio of the moles of CH₄ to the moles of O₂ in the feed stream is

A) 1.05
B) 0.60
C) 0.51
D) 0.45

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