05/03/2020 & 0183;& 32;Mixing of iron filings and sand is a physical change, as they just mix with each other without the need of a chemical reaction. Burning of a candle is also a physical change, as the flame causes the wax to melt down.
Answer: Mixing of iron and sand; freezing of water are examples of physical changes; while others are examples of chemical changes. Explanation: a Growth of a plant: Growth of the plant include the formation of new compounds. These are chemical processes.
& 0183;& 32;It is clear that iron filings and sand are not soluble in water. Iron filings and sand are just physically mixed together. So it is a mixture.文件大小: 285KB
& 0183;& 32;the mixing of iron and ur is said of itself to be a physical change, so that the sulf iron filings and sulfur/iron II sulfide experiment can be used both as an example of mixture/compound and also of a physical/chemical change. The authors say: Mixing iron and sulfur is not a chemical change but a physical change since a new substance is not ...
A change in which one or more new substances are formed is known as chemical change. For Example, when the iron is exposed to air and moisture, rust formation takes place. Rust is nothing but Iron Oxide; a new substance formed out of the reaction. The colour of the surface of the iron also changes. Hence, rusting of iron is a chemical change.预计阅读时间：3 分钟