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Is burning of plastic physical change or chemical change?
The burning of plastic is a chemical change. During the burning process, the molecular structure of the plastic is altered as it undergoes combustion, releasing energy in the form of heat and light.
Why are vitamins kept in colored bottles to prevent a chemical change of heat or light?
Vitamins are typically kept in colored bottles to protect them from exposure to light, which can degrade their potency by causing a chemical change. Light exposure can lead to oxidation of vitamins and reduce their effectiveness. Colored bottles help block out light and preserve the vitamins' stability.
Is that blackish red stuff that forms on old kectup bottles a physical change?
yes
Is the melting of plastic a chemical reation?
No, the melting of plastic is a physical change, not a chemical reaction. Melting simply involves a change in state from solid to liquid due to increased temperature, without any chemical bonds being broken or formed.
Is a plastic tray melting a physical or chemical change?
Melting of a plastic tray is a physical change because it is a reversible process where the plastic changes from a solid to a liquid state without any chemical changes occurring.
