One Question per Day on Synthetic Ammonia (Series 65)

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I. Multiple-choice questions (Each question has 4 options, of which only 1 is correct; fill in the correct option in the brackets) Continuing from series 64: 166. The heat of a chemical reaction is related not only to the chemical reaction itself but also to ( ). A. It is related to the reaction temperature and pressure. B. It is related to the amount of substances participating in the reaction. C. It is related to the state of the substances. D. It is related to all of the above three factors. 167. The legal units of measurement in China mainly include ( ). A. Units specified by Chinese law B. SI units and **other selected measurement units C. Traditional Chinese measurement units D. SI units and traditional Chinese measurement units 168. The steam pressure of a medium-pressure waste heat boiler is ( ). A. 4.0～10 MPa B. 1.4～4.3 MPa C. 1.4～3.9 MPa D. 4.0～12 MPa 169. For gas-solid phase reactions, the appropriate reactor should be ( ). A. Reactor vessel B. Bubble column C. Tubular type D. Fixed-bed 170. The scale of 20:1 in the drawing indicates ( ). A. The image is larger than the actual object. B. The image is smaller than the actual object. C. They are the same size. D. None of the above. Answer: DBCDA. Scoring criteria: 3 points for participation, 1 point for each correct answer