WitrynaSolved by verified expert. Rated Helpful. Answered by titoiiifalcis. 1. Physical change - Tarnishing is a change in the physical appearance of the silver spoon, caused by a chemical reaction. 2. Chemical change - Mould formation is a result of chemical breakdown of the food molecules in the bread. 3. WitrynaPrevention of chemical tarnishing is achieved by using barriers such as lacquers to prevent the reactive chemical species contacting the silver. ... Applications of inhibitors alone gives poor results owing to the difficulty of producing an even application and the physical weakness of the coating 9. Depending on the degree of corrosion, silver ...
Is tarnishing considered a physical or chemical change? - Toppr
WitrynaA physical change does not involve change in composition of a substance. ∙ Melting of iron metal, bending of iron rod, and drawing a wire of iron metal are processes involving change in physical state and shape of substance, hence these are physical changes. Witryna24 lis 2024 · Label each of the following changes as a physical or chemical change. A mirror is broken. An iron nail corroded in moist air; Copper metal is melted. A catalytic … michael mcshane obituary
Is silver tarnishing a chemical change or a physical change?
Witryna17 sty 2024 · Tarnishing of silver is considered to be not useful. It is not considered useful because or else it would include regular polishing while tarnishing of silver shows significant chemical change. Silver oxides and sulphides are further divided into solids in insoluble form and appears to be black in colour. http://blog.teachersource.com/2014/01/18/chemistry-of-tarnished-silver/ Witryna24 lis 2024 · Label each of the following changes as a physical or chemical change. A mirror is broken. An iron nail corroded in moist air; Copper metal is melted. A catalytic converter changes nitrogen dioxide to nitrogen gas and oxygen gas. Answer a: physical change Answer b: chemical change Answer c: physical change Answer d: chemical … michael mcshane md penn state