Chemical Engineering
2018 · Paper 1
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Complete GATE CH 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 43–45 of 65. Imported answers require review unless explicitly marked reviewed.
Question 33
Open questionCHNAT2 marksNeeds review
In a laboratory batch setup, reaction of P over a catalyst was studied at various temperatures. The reactions occurring are
At the end of one hour of operation, the batch contains
,
and
mole fractions of P, Q and R components, respectively. The mole fractions of product components (
and
) were found to vary linearly with temperature as given in the figure. 
If the yield of Q based on reactant P consumed (
) at 25 °C was found to be 0.40, then the value of
at 60 °C is __________ (rounded off to second decimal place).Log in to check the answer
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Open questionCHNAT2 marksNeeds review
An insulated storage tank contains 1000 kg liquid of specific heat 10 kJ kg⁻¹ K⁻¹. The liquid is heated by saturated steam, condensing in a helical coil at a temperature of 180 °C. The heat transfer area of the coil is 0.1 m². If the overall heat transfer coefficient is constant at 1000 W m⁻² K⁻¹, then the time (in hours) required to raise the temperature of the liquid in the tank from 20 °C to 80 °C is __________ (rounded off to second decimal place).
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The wall of a pipe of radius 1 m is at a uniform temperature of 200 °C, and is covered by insulation of thickness 0.1 m. The ambient air outside the insulated pipe is at 20 °C and has heat transfer coefficient of 10 W m⁻² K⁻¹. The thermal conductivity of the insulation material is 0.05 W m⁻¹ K⁻¹. If the heat transfer occurs at steady state, the temperature (in °C) of the outer surface of insulation is __________ (rounded off to second decimal place).
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