25. Which one of the following is not a kind of chemical change?A. Iron rusting. B. Burning wood. C. Cooking an egg. D. Water boiling. 相关知识点: 试题来源: 解析 D D水沸腾(从液态变为气态)不是化学变化.A铁生锈,B木材燃烧和C煮鸡蛋都是化学变化.反馈 收藏 ...
Which one of the following is not a kind of chemical change? A. Iron rusting. Burning wood. Cooking an egg. D. Water boiling. 相关知识点: 试题来源: 解析 D 钢铁生锈,木头燃烧,煮鸡蛋,都是发生了化学变化;而水被煮沸,是物理变化.是否是化学变化,就看是否产生了新的物质....
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...
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...
ChangeIronPhysicalRusting Replies: 2 Forum:Biology and Chemistry Homework Help G The reaction of rusting iron and the heat produced Homework Statement 4Fe+3O2=2Fe2O3 deltaH=-1.65 x 10^3kJ If there are 15.7 grams of iron and 7.99 grams of oxygen, how much heat will be produced? Homework...