Color change chemistry experiments are interesting, visually appealing, and illustrate a wide range of chemical processes. These chemical reactions are visible examples of chemical changes in matter. For example, color change experiments can showoxidation-reduction, pH changes, temperatures changes, exother...
Define changes color. changes color synonyms, changes color pronunciation, changes color translation, English dictionary definition of changes color. v. changed , chang·ing , chang·es v. tr. 1. a. To cause to be different: change the spelling of a word
A. color change B. color shift C. color alteration D. color transformation 相关知识点: 试题来源: 解析 A。化学实验中观察到的颜色变化通常称为“color change”,B 选项“color shift”和 C 选项“color alteration”以及 D 选项“color transformation”都比较生僻,不太符合化学实验中的常用表达。反馈...
A。解析:在化学实验中,我们经常仔细地注意溶液的颜色变化。notice有注意到、察觉到的意思,强调有意识地去关注。find是找到,侧重于结果。recognize是认出,通常是对已经知道的事物再次识别。discover是发现新事物,这里不是发现新的颜色,而是关注颜色变化,所以notice最合适。反馈...
The color change from colorless to pink in a chemical reaction may indicate the presence of _. A. acid B. base C. salt D. water 相关知识点: 试题来源: 解析 B。化学反应中从无色变为粉红色可能表明有碱的存在。A 选项酸一般不会有这种颜色变化;C 选项盐通常也不会有这样的变化;D 选项水是...
【题目】A new color changing ink could aid in health and environment monitoring- for example,allowing clothing to switch colors when exposed to sweat or a woolen blanket to shift colors ifa dangerous gas enters the room. The ink could be printed on anything from a T- shirt to atentWearable...
Which of the following is NOT a sign of a chemical reaction? A. Color change B. Temperature rise C. Shape change D. Gas production 相关知识点: 试题来源: 解析 C。本题考查化学反应的标志。颜色变化、温度上升、产生气体都是化学反应的常见标志,形状改变通常不是化学反应的标志。
Seasons Change; Color Remains Cosmetic trends are everchanging, but color is constant. Color has the unique ability to elicit emotional connections and encourage creative self-expression. Color is a powerful tool for harnessing inclusivity and celebrating diversity. ...
A. the color change B. the temperature change C. the volume change D. the pressure change 相关知识点: 试题来源: 解析 B。化学反应中的能量变化可以通过温度变化来确定。选项 A 颜色变化不一定能确定能量变化;选项 C 体积变化和选项 D 压力变化通常不是直接确定能量变化的方法。反馈...
Which of the following is a sign of a chemical reaction? A. Change in color B. Change in shape C. Change in position D. Change in size 相关知识点: 试题来源: 解析 A。颜色的变化通常是化学反应的标志,形状、位置和大小的变化可能是物理变化导致的。反馈 收藏 ...