【Daily Question】January 6, 2016: Participation +2 Wealth； +3 to 8 wealth for correct answers
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This post was last edited by zjp on 2016-1-8 at 08:27. 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) If a burette is contaminated with oil, it can be cleaned using ( ), and then rinsed three times with tap water and three times with distilled water before use. A. Detergent powder B. Chromic acid cleaning solution C. Strong alkaline solution D. None of the above. Correct answer: B. Reply with your answer in the comments; participating in the quiz earns you +2 wealth points. Getting all answers correct adds another +3 to +8 wealth points. Those who provide thorough analyses and explanations for the questions or answers (or include detailed calculation processes) will receive additional wealth points as a reward. 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.
If the burette is contaminated with oil, it can be cleaned using (B), and then rinsed three times with tap water followed by distilled water before use. A Detaching powder B Chromic acid cleaning solution C Strong alkaline solution D None of the above
If the burette is contaminated with oil, it can be cleaned using (B) chromic acid solution, and then rinsed three times with tap water and distilled water before use.
If the burette is contaminated with oil, it can be cleaned using (B), and then rinsed three times with tap water followed by distilled water before use. A Detaching powder B Chromic acid cleaning solution C Strong alkaline solution D None of the above
If the burette is contaminated with oil, it can be cleaned using (B), and then rinsed three times successively with tap water and distilled water before use.
The correct answer to this question should be A.
B Chromic Acid Cleaning Solution~~~~~~~~~~~~~~~~~~