【Daily Question】2016.1.11 Participation +2 Wealth； +3 to 8 wealth for correct answers
Thread Content
This post was last edited by zjp on 2016-1-13 09:15. To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched; it aims to foster active technical exchanges while also providing financial rewards to users. 【Daily Question】 (Single-choice question) When placing a weighing flask in an oven for drying, the lid of the flask should be ( ). A: Place it across the bottle opening. B: Seal it tightly. C: Remove it. D: Place it anywhere. Correct answer: A. Reply with your answer in the comments; you will receive +2 wealth points for participating in the quiz. An additional +3 to +8 wealth points will be given if you answer all questions correctly. Extra rewards will also be provided if you offer a thorough analysis and explanation of the questions or answers, including detailed calculation processes. 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.
When placing the weighing flask in an oven for drying, the lid should be (C). A Place it across the bottle mouth B Seal it tightly C Remove it D Place it anywhere
C. Remove. -----------------------------
Choose C: When a weighing flask is placed in an oven to dry, the rise in temperature causes the gases or other substances inside the flask to vaporize and expand. If the pressure becomes too high, it can push the lid off or even break it, posing a danger.
When placing the weighing flask in an oven for drying, the lid (C) should be removed.
Remove C~~~~~~~~~~~~~~~~~~~~~~
When placing the weighing flask in an oven for drying, the lid should be (C). A Place it across the bottle mouth B Seal it tightly C Remove it D Place it anywhere