The quantum mechanical approach is currently used to explain atomic structure. The study of fundamental constituents such as atoms, molecules, substances, metals, crystals, and other aggregates of the matter is where traditional chemistry begins. Let’s now see about some basic terms of chemistry a...
When red litmus paper is placed into a basic substance, it will turn blue. If it comes in contact with an acidic or neutral substance, it will remain red. Red litmus paper is meant to test only for an alkaline pH level. Common acids include include tartar sauce, corn, bacon and beer....
36、What color does litmus paper turn when dipped into acid? A、Blue B、Yellow C、Brown D、Red Answer:D 37、Who lived at 1313 Mockingbird Lane? A、The Addams Family B、The Partridge Family C、The Munsters D、Elmo Answer:C 38、Who is considered to be the Father of History? A、Herodotu...
Litmus paper is made from wood cellulose that is infused with an aqueous solution consisting primarily of lichens. During the production of red litmus paper, the lichens are left to ferment in potassium carbonate, ammonia, and a small amount of sulfuric or hydrochloric acid. The mass is then m...
A. To make the solutions colorful. B. To test the acidity or basicity of the solutions. C. To add more substances to the reaction. D. To make the E. xperiment more F. un. 相关知识点: 试题来源: 解析 B。解析:在实验中,用石蕊试纸是为了测试溶液的酸性或碱性。反馈...
49、What color does litmus paper turn when dipped into acid? A、Blue B、Yellow C、Brown D、Red Answer:D 50、What is the HTTP status code 404? A、Accepted B、Forbidden C、Not Found D、Unauthorized Answer:C 51、Edward Salk developed a vaccine against what?
2. pH Test Paper – Broad Range But Less Accurate Commonly known as test strips or litmus paper, this paper changes color according to how acid or alkaline a substance is. Simply tear off a strip of paper, dip it into your aquarium water and wait for it to dry. ...
A. Tastes sweet B. Turns litmus paper blue C. Reacts with metals to produce hydrogen gas D. Has no E. ffect on indicators 相关知识点: 试题来源: 解析 C。本题考查酸的性质。酸尝起来是酸的,不是甜的,A 错误;酸能使石蕊试纸变红,不是变蓝,B 错误;酸能和金属反应产生氢气,C 正确;酸对指...
Is there a character on the screen? If so, what action is the character performing? What props are in the scene?This should fit in with the context of the background/setting you’re using Will any text appear on the screen? What is the size, color, and position of the text?
百度试题 结果1 题目Before the reaction, what color did the acid solution turn blue litmus paper? A. Blue. B. Red. C. Green. D. Yellow. 相关知识点: 试题来源: 解析 B。解析:实验前,酸性溶液使蓝色石蕊试纸变红。反馈 收藏