[Question of the Day] 2015.12.31 Participation +2 Wealth； Correct answers earn an additional +3~8 wealth

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This post was last edited by zjp on 2016-1-3 at 10:52. To increase the popularity of the Chemical Engineering Analysis section, we are launching the “Question of the Day” activity. This will not only foster a lively atmosphere for technical exchanges, but also reward participants with certain wealth rewards. [Question of the Day] (Single-choice question) In the Kjeldahl method for determining the nitrogen content in ***, a ( ) catalyst is usually used. A. K2SO4 + CuSO4
B. K2SO4 + CuSO4 + selenium powder
C. K2SO4 + CuSO4 + H2O2
D. Reducing agent + K2SO4 + CuSO4

Correct answer: D

Reply with your answer to participate in the quiz. You’ll earn +2 wealth points. If you get all answers correct, you’ll receive an additional 3–8 wealth points. Those who provide thorough analysis and explanations regarding the questions/answers (or detailed calculation processes) will also be rewarded with extra wealth points. If your answer is correct and your analysis is accurate, it may be designated as the “Best Reply” (or best response). Feel free to answer the questions. Note: After 24 hours, we will close this thread and announce the best reply (the best helpful response), along with the answer and explanation.