百度试题 结果1 题目When iron rusts, it is a: A. Physical change B. Chemical change C. Both physical and chemical change D. None of the above 相关知识点: 试题来源: 解析 B。铁生锈是化学变化,生成了新的物质铁锈。反馈 收藏
When iron rusts, it is a(n) ___. A. chemical reaction B. physical change C. electrical reaction D. biological change 相关知识点: 试题来源: 解析 A。解析:铁生锈是化学反应,生成了新物质铁锈。选项 B 物理变化没有新物质生成,不符合。选项 C 电反应与题目无关。选项 D 生物变化不符合铁生锈...
Rust is iron oxide (Fe2O3). Thus, rust and iron are not the same substance. Rust is different from iron on which it gets deposited. Rusting of iron is a chemical change (because a new substance ‘iron oxide’ is formed in this process). Almost every iron (or steel) object kept in...
The usually accepted view has been that iron will not rust unless carbonic acid is present. After a very careful investigation of the subject, I was led to the conclusion that provided iron, oxygen, and liquid water are brought together, chemical change takes place with the production of rust...
When an iron nail rusts, what is one product? Yes, becauseenergy is released. Two substances are combined and heat is produced. What type of change occurs when a nail rusts? Rusting is an example of achemical change. Is a nail rusting a chemical change?
Cutting of paper into pieces is a chemical change. View Solution Rusting of iron is quicker in saline water than in ordinary water. Give reason. View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10...
When an iron nail rusts, it is a ___. A. 声同响到处取上声同响到处取上chemical reaction声同响到处取上声同响到处取上 B. 红打厂想查领料选处别红打厂想查领料选处别physical change红打厂想查领料选处别红打厂想查领料选处别 C. 每指个见红厂离重每指个见红厂离重biological process每...
Define rusting. What are the two necessary conditions for rusting of iron ? Give the chemical name of rust. View Solution Is rusting of iron a reversible change? View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions ...
“The best part about our sensor is that we can now visualize the changes of Fe2+and Fe3+and their ratios in each location,” said Yuting Wu, a co-first author of the study and a postdoctoral researcher in Lu’s lab at UT Austin. “We can change one parameter at a time to see ...
These old iron chains give off a small amount of heat as they rust. The rusting of iron is a chemical process. ... The rusting of iron is a much slower process, but it stillgives off energy. It's just that it releases energy so slowly that you can't detect a change in temperature...