It will turn red C. It will turn black D. It will not change color 相关知识点: 试题来源: 解析 B。解析:柠檬汁是酸性物质。石蕊试纸(litmus paper)遇酸性物质会变红,遇碱性物质会变蓝。因为柠檬汁是酸性的,所以石蕊试纸会变红,而不是变蓝、变黑或者不变色,所以A、C、D错误。
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...
A. Turned red litmus paper blue. B. Turned blue litmus paper red. C. Did not change the color of either red or blue litmus paper. D. Made the litmus paper disappear. 相关知识点: 试题来源: 解析 C。解析:反应后,生成的溶液对红色或蓝色石蕊试纸都没有改变颜色。反馈...
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
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....
Step by step video & image solution for What will be the action of litmus paper on the following substances ? (i) Lemon juice (ii) Vinegar (iii) Dry HCI gas (iv) Dry NH_(3) (v) Soap solution (vi) Milk by Chemistry experts to help you in doubts & scoring excellent marks in Clas...
Red Litmus Paper Properties 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...
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...
A spot of a sample whose retention factor is 0.95 is observed. Does this indicate that the unknown material is a pure compound? If it is not a pure compound, how can purity be verified? Classify each of the following pure substance or a mixture if it is a pure su...
Which solution will change red litmus to blue? a- HCl (aq) b- NaCl (aq) c- NaOH (aq) d- CH_3OH (aq) What will be the color of a nitric acid solution when the indicator phenolphthalein is added? What does the color indicate about the strength of an acid or base?