GATE MT 2017 Paper 1 — page 13

Questions 37–39 of 65. Imported answers require review unless explicitly marked reviewed.

In primary steelmaking, dissolved oxygen (O) reacts with carbon (C) to produce CO (g), at 1 atm pressure according to the reaction: C + O = CO (g). The equilibrium constant for this reaction is

, where T is in Kelvin. Assuming Henrian activity coefficient of both O and C to be unity, the dissolved oxygen content (in wt.%) of plain carbon steel melt with 0.7 wt.% C at 1600°C is __________ (answer up to four decimal places)

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A stoichiometric mixture of CO and pure oxygen at 1 atm and 25°C flows into a combustion reactor. The molar flow rate of CO entering the reactor is 1 kg-mol·h

. The adiabatic flame temperature (in K) for the combustion of CO with stoichiometric oxygen is __________ (answer up to two decimal places)

Given:

kJ (kg-mol CO)

kJ (kg-mol K)

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A solution contains

M of Fe

at 25°C. The solubility product of Fe(OH)

. Assuming activity equals concentration, the minimum pH at which Fe

will precipitate as Fe(OH)

is __________ (answer up to two decimal places)

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2017 · Paper 1

Question 37

Question 38

Question 39