【Daily Question】2016.1.23 Participation +2 Wealth； +3 to 8 wealth for correct answers

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This post was last edited by zjp on 2016-1-25 at 16:28. To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched; this aims to foster active technical exchanges while also providing financial rewards to users. 【Daily Question】 (Single-choice question) When a solution of an organic compound obtained after treatment with sodium is acidified with dilute HAc and then dilute Pb(Ac)2 solution is added, a black precipitate forms; this indicates that the compound contains the element ( ). A N B S C I D Cl – Correct answer: B. Post your answer in the reply section; this will earn you +2 wealth points. If you answer all questions correctly, you’ll receive an additional +3 to +8 wealth points. Those who provide thorough analyses and explanations for the questions (or include detailed calculation processes) will receive extra wealth points as well. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Note: We will close this post after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation.