One Question per Day on Synthetic Ammonia (Series 47)
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The last edit to this post was made by penghh1985 on 2016-3-20 08:06, with the file bg2.png being modified. I. Multiple-choice questions (each question has 4 options, of which only 1 is correct; enter the correct option in the brackets). Continuing from series forty-six: 231. The carbon monoxide conversion reaction is a ( ) reaction. A. Gas-solid phase, uncatalyzed B. Constant volume C. Increasing volume D. Decreasing volume 232. The main component of iron-chromium catalysts before reduction is (). A. Iron oxide trioxide B. Chromium oxide trioxide C. Magnesium oxide D. Aluminum oxide 233. The key points in operating a reduction catalyst during production are ( ). A. The concentration of CO or H2 in the reducing gas should not be too high; the heating rate should be slow. B. The concentration of CO or H2 in the reducing gas should be high; the heating rate should be fast. C. The concentration of CO or H2 in the reducing gas should be high; the heating rate should be slow. D. The concentration of CO or H2 in the reducing gas should not be too high; the heating rate should be fast. 234. What is the effect of increasing pressure on the shift reaction? A. Affects the equilibrium and reduces the reaction rate. B. Has no effect on either the equilibrium or the rate. C. Affects the equilibrium but not the rate. D. Has no effect on the equilibrium but can increase the reaction rate. 235. During zinc oxide desulfurization, if the gas space velocity increases, then the sulfur capacity will (). A. Increase B. Decrease C. Remain unchanged D. Unable to determine Answer: B A A D B Scoring criteria: 3 points for participation, 1 point for each correct answer, and 1 additional point if the answer is kept hidden. It should be specifically noted that, in order to help everyone remember the practice of hiding answers, starting with this daily question, requests will occasionally be made for respondents to hide their answers. If the answerer is not hidden, they must participate in scoring.
This post was last edited by penghh1985 on 2016-3-20 08:05. To find out how to hide the bg9.png file, see: http://bbs.hcbbs.com/thread-1551107-1-1.html
This post was last edited by penghh1985 on 2016-3-20 08:27: B A A D B
This post was last edited by penghh1985 on 2016-3-20 09:07. The carbon monoxide conversion reaction is a (B, constant-volume) reaction. 232. The main component of iron-chromium catalysts before reduction is (A, ferric oxide). 233. When reducing medium-temperature catalysts in production, the key operating points are (A: the concentration of CO or H2 in the reduction gas should not be too high; the temperature increase should be gradual). 234. The effect of increasing pressure on the shift reaction is (D: it has no effect on the equilibrium but can increase the reaction rate). 235. When using zinc oxide for sulfur removal, an increase in the gas space velocity results in a (B: decrease) in sulfur capacity.
This post was last edited by penghh1985 on 2016-3-20 at 12:44. Good!
This post was last edited by penghh1985 on 2016-3-20 12:58. Answer: B A A D B
This post was last edited by penghh1985 on 2016-3-20 13:50: B A A D B