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What is the temperature range at which the preheated gas flows through the inside of tube, which contains promoted iron catalyst?

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What is the temperature range at which the preheated gas flows through the inside of tube, which contains promoted iron catalyst?

(a) 450-500 Celsius

(b) 500-550 Celsius

(c) 550-600 Celsius

(d) 400-600 Celsius

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This intriguing question originated from Inorganic Chemical in portion Inorganic Chemical Industries of Chemical Technology

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The correct answer is (b) 500-550 Celsius

Best explanation: The preheated gas flows next through the inside of the tube, which contains promoted porous iron catalyst at 500-550 Celsius.

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