【Daily Question】December 28, 2015 – Participate to earn +2 wealth； +3 to 8 wealth for correct answers
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This post was last edited by zjp on 2015-12-30 at 14:18. 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) In the oxime method for determining carbonyl compounds, to ensure complete reaction, the reagent is usually used in excess along with ( ). A: Add ethanol; B: Add pyridine; C: Heat under reflux for 30 minutes; D: Strictly control pH at 4. Correct answer: B. Reply with your answer in the comments to participate in the quiz – you will receive +2 points. If you answer all questions correctly, you’ll get an additional +3 to +8 points. Those who provide thorough analyses and explanations for the questions (or include detailed calculation processes) will receive extra 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.
The oximation method for the determination of carbonyl compounds uses an excess of reagent to ensure complete reaction, and (B) pyridine is added. A Add ethanol B Add pyridine C Heat under reflux for 30 minutes D Strictly control pH at 4
To determine carbonyl compounds by the oxime method, an excess of reagent is usually used (B) to ensure complete reaction. A Add ethanol B Add pyridine C Heat under reflux for 30 minutes D Strictly control pH at 4
B. Add pyridine--------------------
To determine carbonyl compounds by the oxime method, an excess of reagent is usually used to ensure complete reaction (A). A Add ethanol B Add pyridine C Heat under reflux for 30 minutes D Strictly control pH at 4
To determine carbonyl compounds by the oxime method, an excess of reagent is usually used (B) to ensure complete reaction.
To determine carbonyl compounds by the oxime method, an excess of reagent is usually used (B) to ensure complete reaction. A Add ethanol B Add pyridine C Heat under reflux for 30 minutes D Strictly control pH at 4